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【简答题】
A: My American friend has invited me to a 1)__________________ at his apartment. B: That’s great. A: But I’ve never been to a party given by a 2)__________________. I’m afraid 3) I won’t know __________________ . B: Relax. Just be yourself and act 4)__________________. A: I know. 5) But it’s easier __________________. B: Well, let me tell you. First you should arrive there on time or a few minutes later, but not earlier.
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举一反三
【单选题】下列命题中,正确的命题是
A.
若 ,则
B.
若 ,则
C.
若 ,则
D.
若 ,则
【单选题】I am sure he is up to the job()he would give his mind to it.
A.
if only
B.
in case
C.
until
D.
unless
【单选题】I am sure () he said is true.
A.
that
B.
about that
C.
of that
D.
that what
【单选题】一平面应力状态如图所示,如果最大主应力为拉应力100MPa,试求:(1)上述面上的切应力t;(2)该点处另一非零主应力;【图片】
A.
38.73MPa, 60MPa
B.
48.73MPa, -60MPa
C.
38.73MPa, -60MPa
D.
48.73MPa, 60MPa
【简答题】若一点应力的三个主值存在 a 1 > a 2 > a 3 , 则最大切应力所在平面上的正应力为 。
【单选题】I am sure he said is true.
A.
that
B.
about that
C.
of what
D.
what
【单选题】下列变形中,不正确的是
A.
若 ,则
B.
若 ,则
C.
若 ,则
D.
若 ,则
【单选题】5 1 、 绕线式三相异步电动机,转子串电阻起动时( )。 A 起动转矩增大,起动电流增大; B 起动转矩增大,起动电流减小; C 起动转矩增大,起动电流不变; D 起动转矩减小,起动电流增大。
A.
B.
C.
D.
D
【单选题】下列命题中正确的是 [     ]
A.
若 ,则
B.
若 ,则
C.
若 ,则
D.
若 ,则
【单选题】The boy is curious _____ everything. I am sure he is very clever.
A.
to
B.
about
C.
with
D.
In
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