题目内容

Vitamin B enables the body to _____ full use of the food taken in.

A) make
B) reach
C) put
D) bring

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These construction workers are required to participate ____ the safety training program.

A) at
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C) in
D) to

We’ll send the memo in advance ____ all people can have enough time to get prepared.

A) in case
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某一单级单吸泵，流量Q=45m3／h，扬程H=33.5m，转速n＝2900r／min，试求比转数ns＝

A. 100
B. 85
C. 80
D. 60

音乐学导论课程为哪类课程

A. 学位课程
B. 专业核心课
C. 专业选修课
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