超氧化钾(用X表示)能与二氧化碳反应生成氧气,在载人航天飞机和潜水艇中可用它作制

题型:填空题

问题:

超氧化钾(用X表示)能与二氧化碳反应生成氧气,在载人航天飞机和潜水艇中可用它作制氧剂,供呼吸之用.超氧化钾(X)与二氧化碳反应的化学方程式为:4X+2CO2=2K2CO3+3O2则X的化学式为 ______,超氧化钾属于 ______(填酸、碱、盐、氧化物).

考点:化学式的写法和意义质量守恒定律酸、碱、盐氧化物
题型:填空题

学习了“人的生殖与发育”后,某同学做了如下总结,其中错误的是(  )

A.人的发育起始于婴儿的出生

B.受精卵发育初期营养物质来自卵细胞的卵黄

C.受精卵形成的场所是输卵管

D.产生卵细胞并分泌雌性激素的是卵巢

题型:填空题

Certain people make you feel comfortable when they are around. You spend an hour with them and feel as if you’ve known them half your life. These people have something in common. And once you know what it is, we can try to do it ourselves.

How is it done? Here are several skills that good talkers have. If you follow the skills, they will help you to put people at their ease, and make friends with them quickly.

First of all, good talkers have asked questions. Almost anyone, no matter how shy he is, will answer a question. One well-known businesswoman says, “At business lunches, I always ask people what they did that morning. It’s a common question, but it will get things going.” From there you can move on to other matters ----sometimes to really personal questions. And how he answers will let you know how far you can go.

Second, once good talkers have asked questions, they listen for the answers. This point seems clear, but it isn’t. Your question should have a point and help to tell what sort of person you are talking to. And to find out, you really have to listen carefully and attentively.

Real listening at least means some things. First it means not to change the subject of conversation. If someone sticks to one topic, you can take it as a fact that he is really interested in it. Real listening also means not just listening to words, but to the tone (语调)of voice. If the voice sounds dull, then it’s time for you to change the subject.

Finally, good talkers know well how to deal with the occasion of parting. If you’re saying goodbye, you may give him a firm shakehand and say, “I’ve really enjoyed meeting you.” If you want to see that person again, don’t keep it a secret. Let people know what you feel, and they may walk away feeling as if they’ve known you half their lives.

小题1:You’ll like to stay with some people____.

A.who have something in common with you

B.when you get into real trouble

C.with whom you feel it easy to get along well

D.from whom you can get necessary and timely help小题2:After asking somebody a question, you should____.

A.make it clear what is fit to ask next

B.wait quietly for his answers

C.go on to ask more questions

D.change the subject to another one小题3:If you want to see that person again,____ when parting.

A.let him know what you feel

B.giving them a firm shakehand

C.asking proper questions and being a good listener

D.keeping talking to others to them in the conversation

题型:填空题

收货人在目的地收到货物后,打开集装箱发现箱内货物受损,且数量少于提单所记载的数量。依据我国《海商法》的规定,收货人应当在集装箱货物交付的次日起()内向承运人提交索赔通知。

A.3日

B.7日

C.15日

D.21日

题型:填空题

老子认为一个国家的法律越多说明这个国家的违法之人就越多。

题型:填空题

存货监盘的程序主要采用实质性测试的方式来获取有关存货存在的证据,一般不依赖控制测试来获取该类证据。()

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