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【单选题】
is a machine by which mechanical energy is transformed into electrical energy.A.
An electric motor
B.
An alternator
C.
A fresh water generator
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【单选题】I wonder who wiped the windows so clean. Your mum ______ it, for she was out the whole day.
A.
couldn't do
B.
mustn't do
C.
shouldn't have done
D.
couldn't have done
【简答题】She _____ clean out the storage room last week, but was too much occupied at that
time.A. intended to B. was intended to C. had intended to D. has intended to
【单选题】Mary______clean out the guest room last Saturday, but she was too busy that day.
A.
has intended to
B.
was intended to
C.
intended to
D.
had intended to
【简答题】图示体系的多余约束个数为____。【图片】
【单选题】She ____ clean out the space room last week, but was too much occupied at that time.
A.
intended to
B.
was intended to
C.
had intended to
D.
has intended to
【单选题】She ______ to clean out the spare room last week, but it was much too occupied at that time.
A.
intended
B.
was intended
C.
had intended
D.
was intending
【单选题】She ________ clean out the storage room last week, but was too much occupied at that time.
A.
intended to
B.
was intended to
C.
had intended to
D.
has intended to
【简答题】图示体系的多余约束个数为（ ）【图片】
【单选题】She _____ clean out the spare room last week, but it was too much occupied at that time. [ ]
A.
intended to
B.
was intended to
C.
had intended to
D.
has intended to
【简答题】Access 2010 数据库的文件扩展名是
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