单项选择题

对于洗苯工艺来说，要求的操作温度为( )℃。

A.20～25
B.25～30
C.25～27
D.30～50
<上一题 目录 下一题>
热门 试题

单项选择题
The nocturnal habits and ____ cries of owls have made them objects of superstition for some peoplE.
A、delightful
B、wonderful
C、pleasant
D、mournful
单项选择题
Old as he is, he has ___to do every day.A. a lot of workB. much worksC. lots of homeworksD. quite a lot of homeworks
相关试题