问题
单项选择题
助排剂其实是一种可以降低油水界面张力的（）。
A.缓蚀剂
B.转向剂
C.降滤失剂
D.表面活性剂
答案
参考答案：D
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助排剂其实是一种可以降低油水界面张力的（）。
A.缓蚀剂
B.转向剂
C.降滤失剂
D.表面活性剂
参考答案：D
| 完形填空。 |
| Mr Black works in a hospital (医院). As a good 1 , the people in the town like him. He's often 2 to the patients (病人) and looks them over carefully. 3 he's always busy and has little time to rest. One morning Mr Black got to the hospital and saw there was a fat woman in the 4 . He called her into his office and asked," 5 . madam?" "It was my birthday yesterday, sir", said the woman. "My husband gave me a 6 . But I couldn't push my way in (挤进) it." " 7 , madam," said Mr Black. "You must lose some weght (减肥). You'll be able to 8 your coat, if you do all that I say." "You're 9 , sir," said the rich woman. "He bought me not a coat, but an expensive 10 ." |
| ( )1.A.doctor ( )2.A.bad ( )3.A.Or ( )4.A.classroom ( )5.A.How do you do ( )6.A.house ( )7.A.It doesn't matter ( )8.A.put ( )9.A.right ( )10.A.bike | B.farmer B.fine B.But B.waiting roon B.How are you B.coat B.It's a pleasure B.wear B.wrong B.bus | C.teacher C.cold C.So C.park C.What's the matter C.shop C.I have no idea C.buy C.easy C.car | D.cleaner D.kind D.Then D.zoo D.How old are you D.present D.It's my favourite D.wash D.good D.truck |