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【单选题】
We didn't go home ______ the old man was sent to the hospital. [ ]A.
until
B.
when
C.
while
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【单选题】We can’t feel thatwe are going forward as everythjng us is moving thesame speed ．
A.
． around ； at
B.
． around ； with
C.
． before ； at
D.
． with ； in
【简答题】根据句意及首字母补全单词，使句意完整。 1. Why didn't you come to my birthday party? Because I had a music l________. 2. This pair of shoes is too big. Do you h ave a________ pair? 3. There is going to be a piano c_____...
【单选题】All of us are looking forward to _____ a trip to the Ming T ombs.
A.
make
B.
making
C.
to making
D.
have made
【简答题】将2NF的关系模式转变为3NF的关系模式，是消除了______。
【单选题】—I don't like the plan they put forward. You have never______ it, haven't you? —______, I seriously doubt its future. [ ]
A.
approved of; No
B.
agree with; Yes
C.
judged; No
D.
supported; Yes
【单选题】The students are looking forward to a good result in the final examination, aren’t they?
A.
getting
B.
have
C.
has
D.
get
【单选题】关系模式3NF是指
A.
满足2NF且不存在非主属性对关键字的传递依赖现象
B.
满足2NF且不存在非主属性对关键字的部分依赖现象
C.
满足2NF且不存在非主属性
D.
满足2NF且不存在组合属性
【单选题】关系模式中3NF是指
A.
满足2NF且不存在非主属性对关键字的传递依赖现象
B.
满足2NF且不存在非主属性对关键字部分依赖现象
C.
满足2NF且不存在非主属性
D.
满足2NF且不存在组合属性
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