4.Scientists ________ in many ways for their contributions _______ the development and
progress of human society.
A.always honour; to B.always honour; for
C.are always honoured; to D.are always honoured;for
3.He spent a large ______ of money on his clothes, which was ______ more than his earnings.
A.number; a little B.piece; a great deal C.deal; lot D.amount; far
2.Jack had travelled six miles across the channel ________ his engine failed and was forced to
land on the sea.
A.when B.until C.after D.since
第一节:单项填空(共20小题;每小题0.5分,满分10分)
1.----- Let’s go Dutch for this supper, OK?
----- No, __________ this time, as a reward for all your help.
A.it’s up to you B.it’s my treat C.let’s talk about it D.it doesn’t matter
17.已知则的解集
是 。
16.若某个多面体的三视图如图所示,那么该几何体
的体积为 。
15.已知均为单位向量,且它们的夹角为60°,当取最小值时,
。
14.若圆柱的母线与底面直径和为3,则该圆柱的侧面积的最大值为 。
13.将一颗质地均匀的正方体骰子(六个面的点数分别为)先后抛掷两次,记第一次出现的点数为,第二次出现的点数为,则事件“”的概率
为 。
12.已知一组数据为,,5,4,6,若这组数据的平均数为5,方差为2,则||的值为 。
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