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【单选题】
一束平行单色光垂直入射在光栅上,当光栅常数( b + b’ )为下列那种情况时( b 代表每条缝的宽度), k =3 、 6 、 9... 级次的主极大均不出现? [ ]A.
b + b’ =2 b
B.
b + b’ =3 b
C.
b + b’ =4 b
D.
b + b’ =6 b
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【判断题】The farmer couldn’t plant the potatoes because it was not the right season. ( ) 2. His wife was not strong enough to do the digging. ( ) 3. There were no friends or neighbors willing to help out. ...
A.
正确
B.
错误
【单选题】听力原文：We are a new and growing firm in the area. And we're willing to do our best to attract customers away from our competitors with more favorable terms. (29)
A.
We cannot compete with our rivals, since we have just started our business here.
B.
We want to have more customers, so we're ready to make more favourable offers.
C.
We are unable to provide the best service here, because we do not have enough competitive advantage.
D.
We plan to merge our competitors in this area, as we are growing and have more customers.
【简答题】The child is always (willing) ______ to do his homework, so he has not made much progress.
【简答题】晨兴理荒秽, 。 (陶渊明《归园田居》)
【单选题】Li: Well, Chinese food divided into 8 kinds of cuisines, such as Cantonese food, Shandong food, Sichuan food etc. Which kind dish you like? Wang: Are there any difference?
A.
do
B.
are
C.
would
D.
did
【简答题】I. Translate the following sentences from English into Chinese. ( 4*5=20 points ) 46. The department may not be able to process your application if you do not provide sufficient information . 47. An o...
【简答题】连杆由小头、杆身和 _____ 三部分组成。连杆 与活塞销相连。
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