罗斯福新政时期，美国政府大力兴办公共工程，其客观作用包括（）①扩大生产资料市场 ②增加就业机会 ③刺激消费需求 ④抑制物价上涨_刷题宝

题干

罗斯福新政时期，美国政府大力兴办公共工程，其客观作用包括（）
①扩大生产资料市场 ②增加就业机会 ③刺激消费需求 ④抑制物价上涨

A：②③

B：①②③

C：①②④

D：①③④

上一题下一题 0.0难度选择题更新时间:2018-06-20 04:46:41

答案(点此获取答案解析）

B

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下列有关民族和民族文化对应错误的是（　　）

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先化简，再求值：

\frac{x}{x^{2} - 1}

\frac{x + 2}{2 x - 2}

\frac{1}{x - 1}

\sqrt{2}

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在森林里有一头大象。

____

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A School Report

Name:Edward Scott		School: Kelvin Grove State High School，London
Grade	7	Term ending	May 6th
Subjects
Maths		He is a little weak in this, but he has tried his best to catch up with others.
Science :		He can work out many difficulties. Well done!
English :		He is the best in the class. Keep it up!
French:		His reading is very good, and he can remember many words.
History:		He is not so good at this, but he has done better than before.
Geography:		He knows the names of many places in the world.
Music		He does like pop songs, and he sings very well.
Remarks(评语)		Edward has the ability to do a lot better. More work is needed next term.
Class teacher		Ivy
Principal		M.L Martin
School reopens		11, September

同类题5

定义“正对数”：ln⁺x= ${\begin{matrix} 0, 0 ＜ x ＜ 1 \\ \ln x, x \geq 1 \end{matrix}$ ，现有四个命题：

①若a＞0，b＞0，则ln⁺（a^b）=bln⁺a；

②若a＞0，b＞0，则ln⁺（ab）=ln⁺a+ln⁺b；

③若a＞0，b＞0，则 $\ln^{+} (\frac{a}{b}) \geq \ln^{+} a - \ln^{+} b$ ；

④若a＞0，b＞0，则ln⁺（a+b）≤ln⁺a+ln⁺b+ln2．

其中的真命题有____（写出所有真命题的序号）

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