题目内容

()是一种通过电脑微波作用于人体的仪器。

A. 减肥仪
B. 高频电疗仪
C. 微波电脑美容仪
D. 健胸仪

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The lateral distance between the original position where the vessel put the rudder one side and the farther lateral position where the vessel drifts away from the center of turning during the early stage of the turning defines ______.

A. Kick
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C. Transfer
D. Advance

以下哪种物质几乎不能通过扩散而通过生物膜

A. H2？？O？？
B. H+
C. 丙酮
D. 乙醇
E. 二氧化碳

There is a man overboard. You must throw him a ____________.

A. life raft
B. life buoy
C. life jacket

城市道路照明设施附近的树木距带电物体的安全距离不得小于()米。

A. 1.5
B. 1
C. 1.8
D. 2,