玻璃器皿、瓷器干烤2小时灭菌的最佳温度是（）. A.100～150℃ B.160～1_爱下问搜题

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问题单项选择题

玻璃器皿、瓷器干烤2小时灭菌的最佳温度是（）.

A.100～150℃

B.160～170℃

C.70～250℃

D.250～300℃

E.300～400℃

答案

参考答案：E

改错题

短文改错。
     此题要求改正所给短文中的错误没。对标有题号的每一行做出判断；
     如有错误(每行只有一个错误) ，则按下列情况改正：
     此行多一个词；把多余的词用斜线(\) 划掉，在该行右边横线上写出该词，并也用斜线划掉。
     此行缺一个词：在却此处加一个漏字符号(∧) ，在该行右边横线上写出该加的词。
     此行错一个词：在错的词下画一横线，在该行右边横线上写出改正后的词。

In Grand Eight I took physics. In one test I get
only 36 percent of the answer correct. I failed the
next one, either. I started to think that maybe I was
not good at it. However, I was not lucky enough to
have a teacher which didn't take my bad grades as a
judgement of my abilities, but simply like an indication
how I should study harder. He pulled me aside and told
me that he knew I could do better. He permitted to retake
the test, and I was pulled my grade to an A. This is what
I discovered: just because a subject is difficulty to learn.
It doesn't mean you are not good at it.

1. _____
2. _____
3. _____
4. _____
5. _____
6. _____
7. _____
8. _____
9. _____
10. _____

单项选择题

HGJ 52-91法兰FF 300-2.5管法兰密封面的类型是（）。

A.全平面

B.光滑面

C.凹凸面

D.榫槽面