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9.足球運動員在比賽中腿部受傷時醫(yī)生常噴灑一種液體物質(zhì)使受傷部位皮膚表面溫度驟然下降,減輕傷員的痛感。這種物質(zhì)是(   )

A.碘酒        B.氟里昂       C.氯乙烷      D.酒精

試題詳情

8.既能發(fā)生皂化反應(yīng),又能發(fā)生氫化反應(yīng)的是(   )

A.軟脂酸甘油酯   B.硬脂酸甘油酯    C.油酸   D.油酸甘油酯

試題詳情

7.有溶液NaOH、NaHCO3溶液、CH3COOH、C2H5OH四種試劑。下列有機物在一定條件下能分別跟這四種試劑發(fā)生反應(yīng)的是(  )

A  CH2=CH-CH2-OH   B  H3C--COOCH3

C  HO--CH2OH    D  HOCH2-COOH

試題詳情

5.有關(guān)化學(xué)用語正確的是(   )

A  乙烯的最簡式C2H4      B  乙醇的結(jié)構(gòu)簡式C2H6O 

C  四氯化碳的電子式   D  臭氧的分子式O3

試題詳情

4.心炯胺是治療冠心病的藥物。它具有如下結(jié)構(gòu)簡式:(  )   

下列關(guān)于心炯胺的描述,錯誤的(  )

    A.可以在催化劑作用下和溴反應(yīng)   B.可以和銀氨溶液發(fā)生銀鏡反應(yīng)

    C.可以和氫溴酸反應(yīng) D.可以和濃硫酸與濃硝酸的是混合液反應(yīng)、

試題詳情

3. 用于制造隱形飛機物質(zhì)具有吸收微波的功能,其主要成分的結(jié)構(gòu)  如圖,它屬于

A.無機物        B.烴

C.高分子化合物     D.有機物

試題詳情

2.聚丙烯酸酯類涂料是目前市場上流行的墻面涂料之一,它具有彈性好,不易老化、耐擦洗、色澤亮麗等優(yōu)點。右邊是聚丙烯酸酯的結(jié)構(gòu)簡式,它屬于(  )。

①無機化合物  ②有機化合物  ③高分子化合物  ④離子化合物  ⑤共價    化合

A.①③④     B.①③⑤     C.②③⑤     D.②③④

試題詳情

1.尿素是第一個人工合成的有機物,下列關(guān)于尿素的敘述不正確的是(  )

A.尿素是一種氮肥                  B.尿素是人體新陳代謝的一種產(chǎn)物

C.尿素能發(fā)生水解反應(yīng)               D.尿素是一種酸性物質(zhì)

試題詳情

4. [范文點評]

1)文中恰當(dāng)?shù)剡\用了轉(zhuǎn)折,并列的連詞,副詞,上下銜接自然,如:what’s more;last but not least; however; what’s worse…

2)多種句型表達方式,同位語從句;原因狀語從句;形式主語句式等… 如:…h(huán)old the opinion (opposite opinion) that…; it is convenient for people to ….

3)文章觀點主題句與論據(jù)分類清晰,層次分明。如:Many people hold the opinion that the advantage of BRT system far outweighs the disadvantages…… However, some people hold the opposite opinion that BRT system may give rise to a lot of problems,(觀點主題句)

三,舉一反三

 [習(xí)作1]

假如你是一位導(dǎo)游。通過觀察游客的行為變化,說明大眾環(huán)保意識日益增強。請根據(jù)下面表格的中文提示,寫一篇短文談?wù)劥朔N現(xiàn)象

幾年前某些游客的行為
現(xiàn)在大多數(shù)游客的表現(xiàn)
亂扔廢物,如塑料帶,罐頭盒,費紙等。
隨身帶走垃圾。
亂刻亂畫,攀樹摘花。
愛護花木.
在林中吸煙,引起火災(zāi)。
林區(qū)不吸煙,以防火災(zāi)。

[寫作內(nèi)容]

    1)請根據(jù)以上提示,談?wù)勥@一現(xiàn)象,文章的開頭已經(jīng)給出。

    2)文章必須包括所有提示要點,但不要逐條譯成英語。

[寫作要求]

只能使用5個句子表達全部的內(nèi)容。

[評分標(biāo)準(zhǔn)]

句子結(jié)構(gòu)準(zhǔn)確,信息內(nèi)容完整和連貫。

With the time on, there is an increasing tendency that more and more tourists have been paying greater attention to environment protection._____________________________________ _______________________________________________________________________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________.

試題詳情

3.[參考范文]

According to the Guangzhou government Office, the bus rapid transit (BRT) system will be piloted on Zhongshan Road (from Tianhe intersection to Xiayuan Section) this year. The BRT system will be adopted throughout the city before the 2010 Asian Games, said Mayor Zhang Guangning. Many people hold the opinion that the advantage of BRT system far outweighs the disadvantages, because it shows concern for common passengers. What’s more, the performance of BRT system will surely speed up the ride and save much time. Last but not least, it will definitely bring about a great advance of public buses and also reduces air pollution. However, some people hold the opposite opinion that BRT system may give rise to a lot of problems, such as

more people needed to manage the traffic. What’s worse, it is inconvenient for people to cross motor and bicycle lanes when getting off the buses.

試題詳情


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