【判断题】【消耗次数：1】
甲醇脱水生产二甲醚的反应中，因副反应非常少，所以转化率的大小是直接影响二甲醚收率的关键指标。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
“人的本质不是单个人所固有的抽象物，在其现实性上，它是一切社会关系的总和。”这句话说明（ ）
①
自然属性是人的本质属性
②
社会属性是人的本质属性
③
自然属性和社会属性都是人的本质属性
④
自然属性和社会属性都不是人的本质属性
【单选题】
马克思运用辩证唯物主义和历史唯物主义的立场、观点和方法，揭开了人的本质之谜，指出人的本质是（ ）。
①
单个人所固有的抽象物
②
一切社会关系的总和
③
人性本善
④
人性本恶
【单选题】
The school was in 1929 by a Chinese scholar.
①
established
②
placed
③
imagined
④
made
【单选题】
Good night and thanks again.
①
You can’t say that
②
No, no. It’s what I can do
③
How can you say that
④
Good night
【单选题】
You uncle seems to be a good driver; I wouldnt dare to travel in his car.
①
even so
②
even though
③
therefore
④
so
【单选题】
We are going to have a dancing party tonight. Would you like to join us?
①
I’m afraid not. Because I have an appointment with my dentist tonight
②
Of course not. I have no idea
③
No, I can’t
④
That’s all set
【单选题】
There is no use a lot without anything.
①
to talk, do
②
talked, doing
③
talking, being done
④
talking, doing
【单选题】
Language learning is a slow process, which a lot of effort, time and practice.
①
requires
②
leaves
③
pays
④
offers
【单选题】
Some of the employees in the company are to work at flexible hours.
①
taken
②
achieved
③
allowed
④
formed