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【单选题】
下述对 U/C 矩阵描述正确的是 ( ) 。A.
U/C 矩阵中， C 表示数据类使用， U 表示数据类产生
B.
U/C 矩阵中，每个具体数据项必须有一个以上的数据产生者和使用者
C.
我们可以通过 U/C 矩阵求解的过程来对系统进行子系统的划分
D.
U/C 矩阵中，功能分组是绝对不可变换的
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【单选题】Owing to the big draft, the ship is not permitted to go alongside until the time of ______.
A.
ebb tide
B.
flood tide
C.
spring tide
D.
slack water
【简答题】(改错) Not until have I passed the examination will I be able to go out to parties.
【单选题】It was not until to bed.
A.
I came back; that my father went
B.
did I came back ; did my father go
C.
I came back ;did my father go
D.
did I came back; that my father went
【单选题】Not until ____ to go on strike.
A.
all the demands has been turned down the workers decided
B.
had all the demands been turned down the workers decided
C.
all the demands had been turned down did the workers decide
D.
had all the demands been turned down did the workers decide
【单选题】Not until all the demands had been turned down ___to go on strike.
A.
did they decide
B.
they decided
【简答题】George Washington Carver George Washington Carver was born in Missouri between 1861 and 18. He was born into slavery. It was not until the end of the Civil War that George became free. As he grew up...
【简答题】He won’t go to bed until she returns home. (Not until...)
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