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【单选题】
在纯剪应力状态中,任意两相互垂直截面上的剪应力,必定是( )。A.
均为正值
B.
均为负值
C.
一为正一为负
D.
均为零
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【单选题】“I think we’re out of your size”翻译成汉语________.
A.
我想你的尺寸已卖光了。
B.
我觉得这尺寸很适合您
C.
我认为您的尺寸太大了
D.
我想我们有您的尺寸
【单选题】— Has ______ problem been solved? — Not yet. We're trying to think of ______ way out, but it's quite difficult to find one. [ ]
A.
a; the
B.
the; a
C.
a; a
D.
the; the
【简答题】We’re trying to ring you back, Bryan, but we think we ________ your number incorrectly. A. looked up B. took down C. worked out D. brought about
【单选题】听力原文：Which carpet do you think I should buy? (A) We have to move everything out. (B) The one with blue stripes. (C) I thought of it a lot. (18)
A.
B.
【单选题】Whenever we’re in ________, we should never lose ______ but try to think of the way out.
A.
the trouble; our hearts
B.
troubles; hearts
C.
trouble; heart
D.
the trouble; the heart
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