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【单选题】
在气孔,水蒸汽分子通过气孔的扩散速度( )A.
与气孔的面积成正比
B.
与气孔周长成正比
C.
与气孔周长成反比
D.
与气孔的面积成反比
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反馈参考答案：
举一反三
【判断题】The ratio of Earnings per Share expresses the relationship between a stock’s market price per share and its earnings per share.
A.
正确
B.
错误
【单选题】You are trying to estimate the growth rate in earnings per share at Time Warner from 1996 to 1997. In 1996, the earnings per share was a deficit of $0.05. In 1997, the expected earnings per share is $...
A.
-600%
B.
600%
C.
120%
D.
cannot be estimated.
【单选题】N A 表示阿伏加德罗常数的值，则下列叙述正确的是 （ ）
A.
6．8g熔融的KHSO 4 中含有0．1N A 个阳离子
B.
1 L 0.5mol／L Na 2 CO 3 溶液中含有的CO 3 2- 数目为0.5N A
C.
25℃时，1 L pH=13的NaOH溶液中约含有N A 个氢氧根离子
D.
标准状况下，一定量的铜与硝酸反应后生成22．4 L NO、NO 2 、N 2 O 4 的混合气体，则被还原的硝酸的分子数大于N A
【判断题】Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 U.S. companies. There appears to be a negative relationship between price/earnings ratio and earnings per sh...
A.
正确
B.
错误
【单选题】下列关于Ipython的说法中,错误的是( )。
A.
Ipython集成了交互式Python的很多优点
B.
Ipython的性能远远优于标准的Python的shell
C.
Ipython支持变量的自动补全、自动收缩
D.
与标准的Python相比,Ipython缺少内置的功能和函数
【单选题】下列关于IPython的说法中,错误的是( )。
A.
IPython是一个交互式计算系统。
B.
IPython的性能远远优于标准的Python shell。
C.
IPython支持变量自动补全和自动缩进。
D.
IPython缺少内置的功能和函数。
【简答题】5mol NaOH 中含Na + _____ 个。
【判断题】True or False: Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 U.S. companies. There appear to be a positive relationship between price/earnings ratio and e...
A.
正确
B.
错误
【简答题】RS plc has just paid a dividend per share of 30p.This was 50% of earnings per share. In Turn, earnings per share were 20% of net assets per share. The current share price is 150p. Required : What is ...
【简答题】RS plc has just paid a dividend per share of 30p.This was 50% of earnings per share. In Turn, earnings per share were 20% of net assets per share. The current share price is 150p. Required : What is ...
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