题目内容

电子商务交易实体的组成包括:()。

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According to Bas Lansdorp, which of the following is NOT TRUE?

A. For a one-way trip to Mars, all the technology exists.
B. He could not come up with the fund for Mars One.
C. We humans have the rockets to send people to Mars.
D. We humans have the equipment to land on Mars.

数字时间戳包括:()共三个部分。

北方渔船上所使用的电解液比重一般为()左右。

A. 1.18
B. 1.28
C. 1.08
D. 1.38

感应电动势的方向可用()判断。

A. 左手定则
B. 左手螺旋定则
C. 右手定则
D. 右手螺旋定则

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