实验室不能用于干烤法灭菌的器材是（）。 A.玻璃培养皿 B.瓷研_爱下问搜题

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问题单项选择题 A1/A2型题

实验室不能用于干烤法灭菌的器材是（）。

A.玻璃培养皿

B.瓷研磨棒

C.不锈钢滤菌器

D.手术刀、剪

E.载玻片

答案

参考答案：D

解析：使用干烤法灭菌，一般需加热至160～170℃，保持2小时，可以达到灭菌目的，适用于玻璃器皿、瓷器、金属器物等，但不适用于利器。

解答题

已知两点A（2，3）、B（4，1），直线l：x+2y－2=0，在直线l上求一点P.

（1）使|PA|+|PB|最小；

（2）使|PA|－|PB|最大.

填空题

用方框中所给单词的适当形式填空，使短文正确、通顺、连贯。（每词限用一次。10分）

come back, go out, pay back, say, find, last, return, lose, take, tell

One day, my good friend Tom put his wallet in his bag. He put his bag in the classroom and __1__ to the playground. When he __2__, he could not find his wallet. So he __3__ some of his classmates. Soon the whole class learned that Tom __4__ his wallet with a lot of money in it. He was sure that one of his classmates __5__ his wallet away, but no one returned it to him.
A few days later, he __6__ his wallet in his bag with only half of the money, together with a note. It _7__, “A thief, yes, but only 50 percent a thief!” A week later, some more money __8__ to Tom with another note saying, “Only 25 percent a thief now.” In the end, all Tom’s money was __9__ in this way. The __10_ note said, “I am 100 percent honest now!”