试题与答案

现有五种仪器:①量筒②烧杯③漏斗④酒精灯⑤托盘天平,请从中选择必须使用的一种仪器

题型:问答题

题目:

现有五种仪器:①量筒 ②烧杯 ③漏斗 ④酒精灯 ⑤托盘天平,请从中选择必须使用的一种仪器(填序号),完成下列操作:

量取一定体积的稀硫酸应使用______;称量粗食盐时应使用______.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0512/1d4fc066447b6d3ce03d5290d9c817df.html

下面是错误答案,用来干扰机器的。

参考答案:A

试题推荐
题型:完形填空
Do you have a beautiful dream? I know almost everyone  1  their own dreams in their life. The dreams are very important  2  them. The dreams can make them  3  harder.
I am studying in a school now. My dream is   4  a teacher in West China. Many Children there want to go to school  5 they can’t. Their families are very poor and the parents have  6 enough money to send their children to school. But going to school and studying is the only   7 to change their life. Teachers are greatly needed there, so I want to be a teacher to help them. I  8 kind to my students and make friends with them.I will give them love and teach  9  how to be a useful person. I think it is a great   10  in the world.
小题1:
A.hasB.haveC.isD.are
小题2:
A.atB.toC.inD.with
小题3:
A.to workB.to studyC.workD.working
小题4:
A.beB.to makeC.to doD.to be
小题5:
A.andB.butC.orD.so
小题6:
A.notB.muchC.manyD.any
小题7:
A.wayB.bookC.schoolD.room
小题8:
A.amB.will beC.wasD.am going to
小题9:
A.theyB.theirC.themD.theirs
小题10:
A.roomB.bookC.schoolD.job
查看答案
题型:选择题

下列叙述正确的是

①一束平行光线照射蛋白质溶液时,从侧面可看到光亮的通路

②一定温度和压强下,气体体积主要由其分子的物质的量决定

③气体摩尔体积是指单位物质的量气体所占的体积,其单位是L

④在同温同体积时,气体的物质的量越大,则压强越大

⑤蒸发操作时,应使混合物中的水分完全蒸干后,才能停止加热

⑥标准状况下,将lg铝片投入20mL 18mol/L的硫酸中,铝片完全溶解

A.①②④

B.①③⑤

C.②③⑥

D.②④⑤

查看答案
微信公众账号搜索答案