題目列表(包括答案和解析)
An annoying problem for humans, who like to boast (夸耀) about all the distant planets and moons we have explored, is that we've never taken a good look right under our noses. The inside of the earth is relatively close, but how can we get there?
The deepest oil well enters a mere six miles into the crust (地殼) (the center of the earth is about 4,000 miles deeper). Russian scientists dug the deepest hole in Siberia, but bottomed out at about 7.5 miles below the surface. The Mohole project, a U.S. plan in the 1950s, called for drilling a hole 25 miles down to the boundary between the hard rocks of the crust and the soft mantle (地幔). Sadly the project involved government supporting.
It gets harder and harder to drill deep into the earth because rocks get softer and softer. Hard but easily broken at the surface, rocks become plastic at depth, and the pressure caused by the weight of the overlaying crust --- about 52,800 pounds per square inch at a depth of ten miles, makes further drilling impossible.
What little we know about the inside of the earth (like the fact that there's a crust, a mantle, and a core) comes from indirect evidence, such as the analysis of earthquakes.
So maybe it's time for a thorough new method to explore the earth's inside. Scientist David Stevenson says we should forget about drilling holes. Instead, we should open a crack (裂縫).
Stevenson suggests digging a crack about a half mile long, a yard wide, and a half mile deep (not with a shovel) but with an explosion on the scale of a nuclear bomb. Next, he'd pour a few hundred thousand tons of molten (熔化的) iron into the crack, along with a robot. The iron, thicker than the surrounding crust, would move downward at about 16 feet per second, carrying the robot with it and opening the crack deeper and deeper. The iron mass would drop for about a week and 2,000 miles to the outer edge of the earth core, the robot sending out data to the surface.
Stevenson compares his idea to space exploration. "We're going somewhere we haven't been before,"he says. "In all possibility, there will be surprises.”
This idea can probably be put in the drawer marked with Isn't Going To Happen. The robot would have to survive temperatures that would melt pretty much anything. But Stevenson's idea may inspire a new look at an old problem. Great things can come from what seems like impossible ideas.
Going inside the earth is _____ than going into space.
A. more interesting B. more possible C. easier D. more challenging
How deep have we gone into the earth until now?
A. 6 miles. B. 4,000 miles. C. 7.5 miles. D. 25 miles.
Which of the following is TRUE about David Stevenson's idea?
A. It is an inspiring but not practical idea now.
B. It is a practical proposal that has come into use now.
C. It is a good proposal that will soon be put into practice.
D. It is a false theory that cannot be carried out at all.
What might be the most suitable title for the text?
A. An Annoying Problem for Humans
B. To the Center of the Earth
C. The Mohole Project
D. David Stevenson's Proposal
It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?
Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!
You Will Need:
● 3 cups of warm water
● Measuring cup (量杯)
● Wide-mouthed jar
● Salt
● Spoon
● Raw (生的)potato
You Will Do:
1. Pour 1.5 cups of warm water into the jar.
2. Add 1/3 cup of salt.
3. Stir(攪拌) until the salt is completely dissolved.
4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.
5. Gently place the potato into the jar. Do not drop it.
What Will Happen:
The potato will sink— but only halfway!
Why?
Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.
The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.
【小題1】In the experiment, what should you do right after you pour the water over the spoon?
| A．Add the salt to the water. | B．Stir the salt into the water. |
| C．Place the potato in the jar. | D．Pour warm water into thejar. |
| A．It is easier to see what you are doing. |
| B．It pushes the fresh water to the bottom. |
| C．It will keep the water from coming out. |
| D．It will keep the liquids from mixing together. |
| A．Step 1 | B．Step 2 | C．Step 3 | D．Step 4 |
| A．Carefully | B．Quickly | C．Secretly | D．Silently |
閱讀下面短文，根據(jù)以下要求：1）漢語提示, 2）首字母提示, 3）語境提示, 在每個空格內(nèi)填入一個適當(dāng)?shù)挠⒄Z單詞，并將該詞完整地寫在右邊相對應(yīng)的橫線上，所填單詞要求意義準(zhǔn)確，拼寫正確。
Hello, everyone. My name is water. I’m one of the most important 1. (自然) resources in the world. I’m very proud of 2. because almost no everyday tasks can beperformed w 3. me. My nickname is liquid gold because I’m precious. People in some areas are always _____4.___(埋怨) about not having enough of me. W 5. still, only 5 per cent of the fresh water is _______6.____(可用的) in rivers and lakes. So protect me and save as 7. of me as possible!. Remember: don’t leave the tap r 8. when you brush your teeth. Don’t throw rubbish into rivers, 9. . Nor pour me into them when I’m dirty.Never waste even a drop, o 10. you’ll run out of me in the near future.
An annoying problem for humans, who like to boast (夸耀) about all the distant planets and moons we have explored, is that we've never taken a good look right under our noses．The inside of the earth is relatively close but how can we get there?
The deepest oil well enters a mere six miles into the crust (地殼) (the center of the earth is about 4,000 miles deeper)．Russian scientists dug the deepest hole in Siberia," but bottomed out at about 7.5 miles below the surface．The Mohole project, a U.S．plan in the 1950s, called for drilling a hole 25 miles down to the boundary be??tween the hard rocks of the crust and the soft mantle (地幔)．Sadly the project involved govern??ment supporting.
It gets harder and harder to drill deep into the earth because rocks get softer and softer． Hard but easily broken at the surface, rocks become plastic at depth, and the pressure caused by the weight of the overlaying crust — about 52,800 pounds per square inch at a depth of ten miles, makes further drilling impossible.
What little we know about the inside of the earth (like the fact that there' s a crust, a mantle, and a core) comes from indirect evidence, such as the analysis of earthquakes.
So maybe it' s time for a thorough new method to explore the earth's inside．Scientist David Stevenson says we should forget about drilling holes．Instead, we should open a crack (裂縫)．
Stevenson suggests digging a crack about a half mile long, a yard wide, and a half mile deep (not with a shovel) but with an explosion on the scale of a nuclear bomb．Next, he'd pour a few hundred thousand tons of molten (融化的) iron into the crack, along with a robot．The iron, thicker than the surrounding crust, would move downward at about 16 feet per second, carrying the robot with it and opening the crack deeper and deeper．The iron mass would drop for about a week and 2,000 miles to the outer edge of the earth core, the robot sending out data to the sur??face.
Stevenson compares his idea to space explo??ration．"We're going somewhere we haven't been before," he says．"In all possibility, there will be surprises."
This idea can probably be put in．the drawer marked with Isn't Going To Happen．The robot would have to survive temperatures that would melt pretty much anything．But Stevenson's idea may inspire a new look at an old problem．Great things can come from what seems like impossible ideas.
Going inside the earth is ________ than going into space.
A．more interesting B．more possible C．easier D．more challenging
How deep have we gone into the earth until now?
A．6 miles． B．4,000 miles． C．7.5 miles． D．25 miles.
Which of the following is TRUE about David Stevenson's idea?
A．It is an inspiring but not practical idea now．
B．It is a practical proposal that has come into use now.
C．It is a good proposal that will soon be put into practice.
D．It is a false theory that cannot be carried out at all.
What might be the most suitable title for the text?
A．An Annoying Problem for Humans
B．To the Center of the Earth
C．The Mohole Project
D．David Stevenson' s Proposal
It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?
Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!
You Will Need:
● 3 cups of warm water
● Measuring cup (量杯)
● Wide-mouthed jar
● Salt
● Spoon
● Raw (生的)potato
You Will Do:
1. Pour 1.5 cups of warm water into the jar.
2. Add 1/3 cup of salt.
3. Stir(攪拌) until the salt is completely dissolved.
4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.
5. Gently place the potato into the jar. Do not drop it.
What Will Happen:
The potato will sink— but only halfway!
Why?
Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.
The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.
1.In the experiment, what should you do right after you pour the water over the spoon?
A．Add the salt to the water. B．Stir the salt into the water.
C．Place the potato in the jar. D．Pour warm water into thejar.
2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?
A．It is easier to see what you are doing.
B．It pushes the fresh water to the bottom.
C．It will keep the water from coming out.
D．It will keep the liquids from mixing together.
3.In which step of the experiment do you add the salt?
A．Step 1 B．Step 2 C．Step 3 D．Step 4
4.What does the underlined word “gently” mean?
A．Carefully B．Quickly C．Secretly D．Silently
1. B：作者不是從其他運(yùn)動，而是從沖浪運(yùn)動中獲得（get）了無止境的挑戰(zhàn)的體會。再則，前文The feeling I get when I'm surfing across that water，becoming one with the ocean也有暗示。take from減少，降低；get from從……得到；make from由……制造； keep from阻止，隱瞞，抑制。
2. C你永遠(yuǎn)也不會是最好的沖浪手，因?yàn)榇笱蟪尸F(xiàn)、提供（offer）的是任何人都控制不了的、數(shù)不盡的、各種各樣的海浪。catch抓住，捕獲；include包括，包含；offer提供；collect收集，聚集。
3. A有些沖浪手自由自在、嫻熟流暢，有些沖浪手則活躍有力、生機(jī)勃勃。注意這兩個句子的并列關(guān)系，應(yīng)該特別注意free 和 flowing之間詞義的順承和協(xié)調(diào)"自由而流暢"，后句的aggressive and__3__也應(yīng)該是這樣一種意義聯(lián)系，故選擇A，sharp可以表示"精明敏捷的，迅速活潑，有力有為"意思，其它三項(xiàng)在意義上與aggressive的順承和協(xié)調(diào)相距甚遠(yuǎn)。
4. D所有的這些都在吸引著我去沖浪，并使之不同于（different）其他運(yùn)動。注意此段第一句The one thing I can get from surfing and not any other sport is endless challenge.也有所暗示。（be）different from和……不同。（be）far from遠(yuǎn)離，遠(yuǎn)非；known和right通常不與from搭配。
5. B我盡力（try）地勸我所認(rèn)識的每一個女孩去做人們認(rèn)為女孩不能做的事情。choose選擇、挑選；try試圖、努力；learn學(xué)習(xí)；promise答應(yīng)、許諾。
6. A朝著新的水平（level）不斷前進(jìn)是人類活動的組成部分。level水平，水準(zhǔn)，標(biāo)準(zhǔn)，級別；point 點(diǎn)，尖端；step步調(diào)，步伐，步驟，措施；part 部分，局部。
7. C所以女孩子們難道不應(yīng)當(dāng)拾級而上，開始沖破（push）男人們過去主宰的事物的極限嗎？reach到達(dá)，伸出；accept 接受，認(rèn)可；push突出，突破攻擊；set 放置，樹立，調(diào)整。
8. D在我們國家有女性和總統(tǒng)不僅僅一起坐（sit），步行（walk），戰(zhàn)斗（fight），而且并肩工作（work）著。同時注意句子的一般現(xiàn)在時意義特征，表示經(jīng)常性的行為。
9. C所以為什么女孩子不能夠肩并肩地與男孩子一起踢足球，外出一起沖浪呢？介詞on表示"在……供職"、"（是）……的成員"，on the football team的意思是"是/成為足球隊(duì)隊(duì)員"。
10. B給女孩子一個獲得成功（succeed）的機(jī)會，讓她們思考（think），感覺（feel）表演（perform），她們就都會有所成就。
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