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【单选题】
Because so many visitors are visiting our school today, some teachers have to _______ guides.A.
serve as
B.
regard as
C.
treat as
D.
use as
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反馈参考答案：
举一反三
【简答题】中国烹饪是如何起源的？
【单选题】80C51 单片机的内部RAM中具有位地址的字节地址范围是 ______ 。
A.
A ．0～1FH
B.
20H～2FH
C.
C .30H～5FH
D.
60H～7FH
【单选题】If you want to get the driver’s_______ you should take some courses first in the traffic school.
A.
license
B.
certificate
C.
passport
D.
permission
参考解析：
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