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【判断题】
地球是个不透明的球体才产生了昼夜更替().
A.
正确
B.
错误
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【简答题】Dear Sirs, We refer to the contract No.4632 covering 500 dozen track suits. We wish to remind you that we have had no news from you about shipment of the goods. As we mentioned in our last letter, we ...
【单选题】This is ear. [     ]
A.
I
B.
my
C.
me
D.
we
【多选题】DI选择汇点输入连接时可直接连接
A.
按钮
B.
NPN集电极开路输出接近开关
C.
继电器触点
D.
PNP集电极开路输出接近开关
【单选题】PR means __________:
A.
promotion relations
B.
public relations
C.
publicity relations
D.
program relations
【多选题】多性状选择的方法有
A.
顺序选择法
B.
独立淘汰法
C.
选择指数法
D.
合并选择法
【单选题】计算消力池池长的设计流量一般选择________。 ( )
A.
使池深最大的流量
B.
泄水建筑物的设计流量
C.
使池深最小的流量
D.
泄水建筑物下泄的最大流量
【单选题】We made plans for a visit, but ______ difficulties with ear prevented it.
A.
subordinate
B.
succeed
C.
successive
D.
subsequent
【单选题】The word' gains' in the second sentence in the last paragraph means ______.
A.
increases
B.
progresses
C.
profits
D.
things
【多选题】DI选择汇点输入连接时可直接连接( )。
A.
按钮
B.
NPN集电极开路输出接近开关
C.
继电器触点
D.
PNP集电极开路输出接近开关
【单选题】The author develops the discussion in paragraph 1 by means of__________.
A.
describing a process
B.
classifying different types
C.
providing historical background
D.
explaining a theory
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