Each term our professors would______a list of books for us to read
A. hand in
B. give away
C. pass out
D. write out
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餐饮业洗手液的余氯浓度一般应控制在()ppm左右。
A. 30
B. 50
C. 80
无论发生次数还是人数,在我国占食物中毒总数第一位的是( )。
A. 细菌性食物中毒
B. 有毒动、植物食物中毒
C. 化学性食物中毒
D. 霉变食物引起的食物中毒
She______be ill because I saw her playing tennis just now.
A. can't
B. couldn't
C. mustn't
D. may not
(As soon as) (we've finished) supper, we'll all (go to downtown) to see (the) Sound of music.
As soon as
B. we've finished
C. go to downtown
D. the