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【单选题】
21 要构成最大十进制为999的计数器,则至少需要 个双稳态触发器。
A.
A.10
B.
50
C.
100
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【单选题】As we all know , bad eating habits and a of exercise may lead to health problems .
A.
lack
B.
limit
C.
need
D.
demand
【简答题】阅读理解。 Dreams may be more important than sleep. Some people don't need much sleep. But we all need to dream, scientists say. Dreams take up about one quarter of our sleeping time. People have several d...
【单选题】We ________ have bought so much food now that Suzie won't be with us for dinner. [     ]
A.
may not
B.
needn't
C.
can't
D.
mustn't
【判断题】我们把没有辅音声母的音节叫零声母音节,把没有辅音声母叫零声母。
A.
正确
B.
错误
【单选题】【C8】
A.
applicants
B.
interviewers
C.
managers
D.
interviewees
【单选题】— Listen! Is Tom singing in the classroom? — No. It be Tom. He has gone to Paris. [     ]
A.
may not
B.
needn't
C.
can't
【单选题】— ______ I visit Lucy on Sunday, Mum? — Yes, you______. [     ]
A.
Must; can
B.
May; may
C.
Need; need
D.
May; need
【判断题】文字、面域、构造线仅能为延伸的边界,不能作为延伸对象。
A.
正确
B.
错误
【简答题】阅读表达。 Dreams may be more important than sleep. Some people don't need much sleep. But we all need to dream, scientists say. (3) Dreams take up about one quarter of our sleeping time. People have sever...
【单选题】Interviewees may need to prepare _____ before participating in interviews. (Choose the best answer)
A.
job offers
B.
application letter
C.
resumes
D.
presen
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