用NA表示阿伏加德罗常数的值，下列说法中正确的是 A．在常温常压下，11.2L

发布时间：2017-05-24 20:39 │ 来源：www.tikuol.com

题型：选择题

问题：

用N_A表示阿伏加德罗常数的值，下列说法中正确的是

A．在常温常压下，11.2L Cl₂含有的分子数为0.5N_A

B．18克水所含的电子数为N_A

C．8克氦气所含分子数为N_A

D．3.2克氧气所含氧原子数为0.2N_A

考点：阿伏加德罗定律

题型：选择题

关于会计要素，下列说法错误的是（）。

A．导致收入或费用发生变化的业务，最终必然导致所有者权益的变动

B．一笔业务可以只影响利润，而不影响收入、费用

C．一笔业务可以不影响收入、费用和利润中的任何一个要素

D．某些特殊业务，可能会导致负债加上所有者权益暂时不等于资产

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题型：选择题

阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话，使其意思完整。

(M = Maggie; N = Nancy)
M: 1. _________
N: It's June 1. It's Children's Day. It's about 20 days since the earthquake hit Wenchuan. 2. _________
M: Maybe. They've suffered a lot. Many of them have become homeless. Some even have lost their lives.
N: 3. _________Our school has done something to help them. I have donated 200 yuan to them. 4. _________
M: Our school has organized a charity show to raise money for the children there. Many students have donated
books as well.
N: 5. _________
M: Er, many, such as popular fairy tales, science stories and so on.
N: What a good job you have done! I hope they will rebuild their homes and go back to school soon.

A. How about your school?
B. What day is it today?
C. How do you celebrate Children's Day?
D. The children there can't celebrate their festival.
E. What kinds of books did you donate?
F. I'm sorry about that.

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题型：选择题

一般认为经济中存在四种周期，其中主周期(又称固定资本投资周期)时间长度约( )

A．40个月

B．10年

C．17年至20年

D．50年至60年

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题型：选择题

若神经损伤修复后，其再生的速度平均每天以多少计算（）

A.0.5~1mm

B.1~2mm

C.2~3mm

D.3~4mm

E.4~5mm

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题型：选择题

根据《担保法》的规定，定金的数额由当事人约定，但不得超过主合同标的额的( )。

A．10%
B．20%
C．30%
D．50%

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