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问题 多项选择题

流动性是证券市场生存的条件，（）可以反映证券市场的流动性好坏。

A.成交数量

B.成交价格

C.成交速度

D.成交效率

答案

参考答案：B, C

解析：价格和速度反映了流动性的好坏

填空题

Part 1


Question 46-50


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计算题

（8分）如图所示，小车质量M=8㎏，带电荷量q=＋3×10－2C，置于光滑水平面上，水平面上方存在方向水平向右的匀强电场，场强大小E=2×102N/C。当小车向右的速度为v=3m/s时，将一个不带电、可视为质点的绝缘物块轻放在小车右端，物块质量m=1kg，物块与小车表面间动摩擦因数μ=0.2，小车足够长，g取10m/s2，求：

（1）物块在小车上滑动过程中系统因摩擦产生的内能。

（2）从滑块放在小车上后5s内电场力对小车所做的功。
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