全预应力混凝土指的是在混凝土构件中受力钢筋全部采用预应力钢筋,非预应力钢筋只起到构造要求或不需配置的构件。
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Have you _____ my shirt?
A. ironing
B. ironed
C. been ironed
D. been ironing
The movie cast and ______ have done a great job.
A. faculty
B. people
C. crew
D. decorator
When I am on the train, I read books to _____.
A. pass the time
B. pass time
C. spend time
D. good time
They want to ____ their own business.
A. set down
B. set for
C. set against
D. set up