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【单选题】
目前,世界上所有的国家几乎都是以( )作为国家发展的动力A.
清洁能源
B.
核能源
C.
化石能源
D.
可再生能源
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】假设 每个用户平均每小时 会话次数为 0.8 ,平均通话时长为 90 秒,每用户平均语音话务量是多少( C ) 爱尔兰。
A.
0.02
B.
0.2
C.
0.3
D.
0.03
【单选题】下列关于带双泵的四轮驱动系统的工作原理描述中,哪一项是正确的?
A.
两个分别由前、后车轮驱动的泵的输入输出流量差异产生了液压压力,然后,该压力使粘性联轴器的盘接合,从而实现2WD/4WD的选择。
B.
两个分别由前、后车轮驱动的泵的输入输出流量差异产生了液压压力,然后,该压力使湿式多盘离合器接合,从而实现2WD/4WD的选择。
C.
当两个油泵所产生的液压压力超过了预定极限时,湿式多盘离合器接合,实现2WD/4WD的选择。
D.
当两个油泵所产生的液压压力之差超过了预定极限时,该状态会被传感器检测到,然后电磁离合器动作,实现2WD/4WD的选择。
【单选题】What you have done will not have _____your fame.
A.
a good effect in
B.
effected
C.
effect
D.
a good effect on
【简答题】图示轴,承受扭力偶矩 M 1 =400N•m 与 M 2 =600N•m 作用。已知许用切应力 [ ]=40MPa ,单位长度的许用扭转角 [ ]=0.25(°) / m ,切变模量 G = 80GPa 。试确定轴径。( 15 分)
【单选题】Which of the following statements is true? Which of the following statements is true? Which of the following statements is true?Which of the following statements is true?3. Which of the following stat...
A.
Negotiating parties are able to reach a win-win deal when they are wrestling on a single issue.
B.
If negotiating parties cannot ask their counterparts directly about their interests, they don't have to bother about it any more.
C.
It is very important for negotiating parties to look at their own positions from their counterparts' point of view.
D.
When negotiating parties figure out their interests, they should maximize their gain at all costs.
【简答题】带式驱动器的工作原理
【简答题】It elaborates on what horizontal integration is and its effect on the market.
【单选题】关于干细胞的说法，下列不正确的是
A.
是一类具有自我复制的多潜能细胞
B.
可分为全能干细胞、多能干细胞和单能干细胞
C.
多能干细胞可以发育成一个个体
D.
单能干细胞只能产生一种细胞类型，具有自我更新属性
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