已知正方形ABCD的边长为6,空间有一点M(不在平面ABCD内)满足|MA|+|

题型:选择题

问题:

已知正方形ABCD的边长为6,空间有一点M(不在平面ABCD内)满足|MA|+|MB|=10,则三棱锥A-BCM的体积的最大值是(  )
A.48B.36C.30D.24
考点:柱体、椎体、台体的表面积与体积
题型:选择题
在△ABC中,角A、B、C所对的边分别为a、b、c,且acosB-bcosA=
1
2
c
,当tan(A-B)取最大值时,角C的值为______.
题型:选择题

下列各项应采取的交配实验方法分别是

(1)鉴别一对相对性状的显隐性关系;(2)鉴别一只白兔是否是纯合子;(3)不断提高小麦抗病品种的纯度[ ]

A.杂交、测交、自交

B.测交、杂交、自交

C.杂交、自交、测交

D.自交、测交、杂交

题型:选择题

根据答句写问句。

1.A:______________________________________________________________ 

     B: Yes, we do. We are pop music fans.

2.A:________________________________________________________________ 

     B: No, we don't. We don't sell rock music in this section.

3.A:________________________________________________________________ 

     B: Because Sandy is so amazing.

4.A:________________________________________________________________ 

     B: No, we don't. We don't like Latin music.

5.A:________________________________________________________________ 

     B: The concert was not bad.

6.A:________________________________________________________________ 

     B: The dance music is on the second floor.

7.A:________________________________________________________________ 

     B: I bought this video at Big Sound Video shop.

8.A:________________________________________________________________ 

     B: Oh, my mother doesn't have a favorite group.

9.A:________________________________________________________________ 

     B: Lucy wants to buy a pop CD.

10.A:_______________________________________________________________ 

       B: The country CDs are behind the rock music.

题型:选择题

用气相色谱法测定苯中微量水和水中微量苯色谱条件有何不同详细说明原因。

题型:选择题

法律之间对同一事项的新的一般规定与旧的特别规定不一致,不能确定如何适用时,由()决。

A.国务院

B.高人民法院

C.全国人民代表大会

D.全国人民代表大会常务委员会

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