下列实验操作中不正确的是() A.蒸馏操作时,应使温度计水银球靠近蒸馏烧瓶的支管

题型:选择题

问题:

下列实验操作中不正确的是(   )

A.蒸馏操作时,应使温度计水银球靠近蒸馏烧瓶的支管口处

B.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

C.分液时,分液漏斗中下层液体从下口放出,上层液体从上口倒出

D.萃取操作时选择的萃取剂,不能与原溶剂互溶且溶质在两种溶剂中溶解性差别要大

考点:化学实验的基本操作化学实验安全危险化学品的标志化学药品的变质
题型:选择题

乙型肝炎是()。
戊型肝炎是()。

A.血液传播

B.飞沫传播

C.唾液传播

D.粪口传播

E.蚊虫传播

题型:选择题

(1).表示09年1月6号生产的药品()。
(2).表示09年1月6号出厂的药品()。
(3).表示10年2月12号失效的药品()。
(4).表示有效期到10年2月11号的药品()。

A.批号为090106

B.失效期为100212

C.两者均是

D.两者均不是

题型:选择题

Elaine Yu Yee-nee, 15, Creative Secondary School

Lockers are designed in a way to hide their contents for a reason. Otherwise, they’d have open fronts like cupboards. Searching students’ lockers would be total invasion(侵犯) of privacy. Having a locker is more than having a place to store your stuff. A locker also gives you the freedom to keep certain things hidden. These can include harmless personal items like diaries, letters and photos. Searching lockers could discomfit students and others might make fun of them.

Yes, lockers are school property(财产). But that doesn’t give schools the right to inspect lockers as they please. While students are using lockers, they have the right to keep their contents private. Teachers could ask for permission to take a look inside a student’s locker and if the student is OK with that, then it would be fine. Searching students’ lockers without their permission would result in the loss of trust.

I doubt that students who have something dangerous to hide, such as weapons or drugs, would put them in their lockers. They would not want to risk being caught so easily.

Giving schools the right to search lockers would not help catch those who commit crimes. But it would certainly create an environment in which students would be embarrassed to have their belongings shown in public for no good reason.

Ronald Ling Pak-ki, 20, University of Hong Kong

Many students see their lockers as personal property. They would never agree that schools should have the right to inspect their lockers. But I think schools have an absolute right to do so.

It is the schools that actually own the lockers. Students just use them to store some of their things safely and conveniently. There are clear rules on what items students can and cannot keep in their lockers. Schools have both the duty and the right to check if students are following the rules.

I don’t think school authorities would decide to search a student’s locker unless they felt the need to do so. They might, for instance, suspect students of hiding drugs. To make sure that the process remains open and fair, only authorized teachers should have the right to search lockers. The search should be carried out in such a way as not to embarrass students in front of others.

小题1:What are .the two students talking about?

A.How to make sure schools are safe.

B.Whether there are crimes in schools.

C.Whether schools can search students’ lockers.

D.How to establish trust between teachers and students.小题2:The underlined word could be replaced by ___.

A.embarrass

B.frighten

C.worry

D.challenge小题3:According to Elaine, school lockers ____.

A.are students’ personal property

B.should be changed into cupboards

C.are likely to hold some dangerous things

D.can be searched with students’ permission小题4:Which of the following would Ronald agree with?

A.Students won’t hide drugs in lockers.

B.Students use lockers but don’t own them.

C.Students should not put personal things in lockers.

D.Students may forbid teachers to inspect their lockers.

题型:选择题

人体是一个有机整体,其中起"主导"作用的是()

A.脑

B.心

C.五脏

D.经络

E.肾

题型:选择题

“喜欢得了不得”是()。

A.中补短语

B.动宾短语

C.连谓短语

D.偏正短语

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