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问题 选择题

体积相同的木块、铝块与铁块浸没于同一液体中，所受浮力最大的是（　　）

A．木块

B．铝块

C．铁块

D．一样大

答案

由F浮=ρgV知，液体密度相同，体积相同，所以浮力相同．

故选D．

单项选择题

A mother is discussing with the nurse her 4-year-old boy’s strange eating habits including not finishing meals and eating the same food for several days in a row. She would like to develop a plan to correct this situation. When developing such a plan, which of the following should the nurse and mother consider

A. Deciding on a good reward for finishing the meal.
B. Allowing him to make some decisions about the foods he eats.
C. Restricting the availability of foods to those served at meal times.
D. Not allowing him to leave the table until he has eaten the foo
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判断题

海运提单按货物是否装船为标准可分已装船提单和收货备运提单，已装船提单是货物装上船后签发的提单。收货备运提单是承运人已收货物但尚未装船时向托运人签发的提单。
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