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【单选题】
（）设立食品安全委员会，其职责由国务院规定。A.
卫生行政部门
B.
公安局
C.
国务院
D.
市政府
E.
司法局
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举一反三
【简答题】Engineers had a better choice of material, ______________ (当新发明被投入使用以后).
【单选题】If a better material______, the strength of the part would have been increased.
A.
had been used
B.
had been using
C.
being used
D.
using
【单选题】A ) It looks unusual. B) It transforms. C) It uses better material. D) It is a new product.
A.
It looks unusual.
B.
It transforms.
C.
It uses better material.
D.
It is a new product.
【简答题】Developing school skills Books to help you to become better teachers or better learners These materials can help both teachers and students of different levels and grades. Reading and Langua...
【简答题】( )法能做到连续,均衡而有节奏地组织施工。
【单选题】If a better material______, the cost of the product would have been decreased.
A.
had been used
B.
had been using
C.
being used
D.
using
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