相關(guān)習題
 0  22751  22759  22765  22769  22775  22777  22781  22787  22789  22795  22801  22805  22807  22811  22817  22819  22825  22829  22831  22835  22837  22841  22843  22845  22846  22847  22849  22850  22851  22853  22855  22859  22861  22865  22867  22871  22877  22879  22885  22889  22891  22895  22901  22907  22909  22915  22919  22921  22927  22931  22937  22945  159627 

科目: 來源: 題型:

There are two dogs in my family. One is white,_____________ black.
A.a(chǎn)notherB.othersC.the otherD.other

查看答案和解析>>

科目: 來源: 題型:

—________ you open the window, please?
—Yes, I can.
A.MayB.NeedC.MustD.Can

查看答案和解析>>

科目: 來源: 題型:

— Tomorrow is Saturday, why don’t we play basketball in the gym?
—Good idea, ________ I have to see my grandparents.
A.soB.orC.butD.a(chǎn)nd

查看答案和解析>>

科目: 來源: 題型:

—Peter, what’s your mother doing now?
—She____________in the kitchen.
A.cooksB.is cookingC.will cookD.cooked

查看答案和解析>>

科目: 來源: 題型:

We won’t go to the park if it   ________ tomorrow.
A.rainsB.has rainsC.rainedD.will rain

查看答案和解析>>

科目: 來源: 題型:

They decided ______ for the children in Yunnan earthquake area.
A.do somethingB.to do somethingC.doing anythingD.done anything

查看答案和解析>>

科目: 來源: 題型:

I love my hometown and I _______ here for 15 years.
A.was livingB.liveC.will liveD.have lived

查看答案和解析>>

科目: 來源: 題型:

(本小題滿分12分)
如圖,四邊形是直角梯形,∠=90°,=1,=2,又
=1,∠=120°,,直線與直線所成的角為60°.

(Ⅰ)求證:平面⊥平面;
(Ⅱ)求二面角的余弦值.

查看答案和解析>>

科目: 來源: 題型:

(本小題12分)如圖,四棱錐中,
側(cè)面是邊長為2的正三角形,且與底面垂直,底面的菱形,的中點.
(1)求與底面所成角的大;
(2)求證:平面;
(3)求二面角的余弦值.

查看答案和解析>>

科目: 來源: 題型:

((本小題滿分12分)
如圖,在四棱錐P—ABCD中,底面ABCD,底面為直角梯形,AD=2,AB=BC=1,PA=
(Ⅰ)設(shè)MPD的中點,求證:平面PAB;
(Ⅱ)若二面角B—PC—D的大小為150°,求此四棱錐的體積.

查看答案和解析>>

同步練習冊答案