下列实验操作或装置正确的是 A.稀释浓硫酸 B.加热液体 C.测定溶液的pH

题型:选择题

问题:

下列实验操作或装置正确的是

A.稀释浓硫酸

B.加热液体

C.测定溶液的pH

D.检查装置的气密性

考点:测容器—量筒称量器—天平加热器皿—酒精灯常见仪器和装置的用途
题型:选择题

Just as in face-to-face communication, there are some basic rules of behavior(行为) that should be followed on the Internet. The basic rule is simple: treat others in the same way you would want to be treated. Imagine how you’d feel if you were in the other person’s shoes.

For anything you’re about to send: ask yourself, “ Would I say that to the person’s face?” If the answer is no, rewrite and reread. If someone in the chat room is rude to you, you needn’t to fire back. You should either ignore(不理睬) the person, or use your chat software to block their messages. Remember to respect the beliefs and opinions of others in the chat room.

Everyone was new to the network once. Offer advice when asked by newcomers, as they may not be sure what to do or how to communicate. When someone makes a mistake, be kind about it. If you do decide to tell someone about the mistake, point it out politely. At the same time, if you find you are wrong, be sure to correct yourself and apologize to those that you have offended(冒犯). You’d better not ask others questions about their age, sex and families. Unless you know the person very well, and you are both comfortable with sharing personal information, or don’t ask such questions.

小题1:The Chinese meaning of the sentence “ treat others in the same way you would want to be treated”

A.以牙还牙

B.以己度人

C.治病救人

D.殊途同归小题2:You should point out someone’s mistake __________.

A.politely

B.rudely

C.patiently

D.seriously小题3:If you don’t know the person very well, you’d better not to ask_______.

A.their age

B.their sex

C.their weight

D.both A and B小题4:This passage is mainly about ____

A.how to communicate

B.sharing personal information

C.basic rules of behavior on the Internet.

D.respecting others in the chat room.

题型:选择题

X、Y、Z、W、Q是原子序数依次增大的短周期主族元素,相关信息如下表

根据上述信息回答下列问题:

(1)元素Q在周期表中的位置:__________。

(2)Z的离子结构示意图:_________。

(3)Y的最简单气态氢化物甲的水溶液可与H2O2发生反应,其产物不污染环境,化学方程式为___________________。

(4)X和氢元素组成的化合物分子中有6个原子,其结构式为____________

(5)已知:

X(s)+O2(g)=XO2(g)  △H=-393.5 kJ/mol

2X(s)+O2(g)=2XO(g)   △H=-221.0kJ/mol

则XO的燃烧热的热化学方程式为_________________

(6)元素Y与氢元素形成的五核阳离子乙,向含乙和Z的阳离子的混合溶液中加入固体Na2O2,加入Na2O2的物质的量与产生的沉淀有如图所示关系。写出有关反应的离子方程式:(每段只用一个离子方程式表示)

O-a段:____________ a-b段:___________

题型:选择题

出现下列哪种情况时应最先考虑泌尿系肿瘤()。

A.膀胱刺激症状

B.无痛性肉眼血尿

C.排尿困难

D.尿失禁

E.尿潴留

题型:选择题

下列关于生产经营单位安全生产管理人员做法的表述,不符合法律规定的是()。

A、根据本单位的生产经营特点,对安全生产状况进行经常性检查

B、对检查中发现的安全问题,应当立即处理

C、对检查中发现的安全问题不能处理的,应当及时报告本单位有关负责人

D、检查及处理情况可不记录在案

题型:选择题

耕作土壤剖面的一般层次是()。

A.表土层、心土层、犁底层

B.表土层、犁底层、心土层

C.心土层、表土层、犁底层

D.犁底层、心土层、表土层

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