正确答案: B

23公斤

题目：手提式电台是一种手摇供电的无线电台，能自15米高处投入水中不致损坏且能浮于水面，总重量不超过：

解析：B

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举一反三的答案和解析：

[单选题]鲨鱼能很远距离感觉到人的汗血腥气味是何种器官：

嗅觉

[单选题]Piston cooling fins are located

beneath the piston crown

[单选题]To prevent excessive __ in the transverse girders, the tie bolts are positioned as close to the center of the crankshaft as possible

bending moments

[单选题]According to the passage, we can infer that the pole piece diameter must be tooth height.

much less than