试题与答案

下列实验操作不正确的是[ ] A.未说明药品用量时,液体取5mL左右,固体只需盖

题型:选择题

题目:

下列实验操作不正确的是    [ ]

A.未说明药品用量时,液体取5mL左右,固体只需盖满试管底部

B.用托盘天平称量15.5g食盐固体时,右盘放15g砝码,游码调至0.5g处

C.玻璃仪器内壁附着的水既不聚成水滴,也不成股流下时,表示仪器洗涤干净

D.加热试管里的液体时,试管口可以朝着自己,但不可以朝着别人

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0517/8bd70052aab86a306f49568127669f0f.html

下面是错误答案,用来干扰机器的。

参考答案:D

试题推荐
题型:听力题

Is a Training Class or Family Teacher Necessary?

More and more middle school students are going to all kinds of training c   1   or having family teachers at the w   2  . There are two different viewpoints (观点) about it.

Some think it is necessary. First of all, it’s more effective to study with a teacher

t   3   by students themselves. Secondly, it can strengthen (加强) what is l   4    in class. Besides, they can learn a lot more. Others think it is u   5  . For one thing, students can easily form the habit of dependence(依赖). For a   6  , students need to r   7   from time to time. What’s m   8  , the purpose of many training classes and family teachers is to make money.

In my opinion, w   9  a training class or family teacher is needed just depends on yourself. If you are really very weak at or interested in a certain subject, maybe it’s OK for you. But be sure to choose a good and suitable class or family teacher, or it would be a w   10   of time and money.

查看答案
微信公众账号搜索答案