一般情况下，用精基准平面定位时，平面度误差引起的基准位移误差（）。 A.为零 B.很

B

Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They’re both poor though they work hard. Most villagers have built new houses, but they still live in the low and broken houses. They never find out why.

Once Uncle Li went to the town to buy some medicine for his wife. In the town he heard the apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.

"I can’t understand why we sustained (蒙受) losses in business while others always profit (赢利)" Uncle Li asked one day.

"The tractor was too small " Uncle Wang said without thinking. "We’ll carry more apples on a truck next time !"

"I agree!" said Uncle Li. "How foolish we were!\

The two farmers carried the apples to the city to（）.

A．make a journey

B．visit some places of interest

C．meet their friends

D．make a profit

如图甲所示，在倾角为θ的光滑斜面上，有一个质量为m的物体受到一个沿斜面向上的变力F作用下，由静止开始运动。物体的机械能E随位移x的变化关系如图乙所示.其中0～x₁过程的图线是曲线，x₁～x₂过程的图线为平行于x轴的直线，则下列说法中正确的是

A．物体沿斜面向下运动

B．在0～x₁过程中，物体的加速度一直减小

C．在0～x₂过程中，物体先减速再匀速

D．在x₁～x₂过程中，物体的加速度为gsinθ

体形美通常地说就是人体各部分整体的（）的比例关系。

人民法院审理认为：2000年10月4日，被告聘请的基层食品卫生监督员依法对原告经营的商店进行食品卫生检查，限期让原告体检办证，责令原告当场销毁经营的不符合食品卫生要求的饮料是正确的。被告以原告妨碍公务为由，要求派出所处理，也是正当的。但被告又于次日(10月5日)对原告作出处罚，属滥用职权的行为，故依照(中华人民共和国行政诉讼法)(以下简称《行政诉讼法》)第54条第 (2)项第5日之规定，判决撤销了被告卫检所对原告的处罚决定。 问题：什么是行政合理性原则本案中被告卫检所的行为是否符合行政合理性原则

精馏过程中的主要设备有（）

A.精馏塔、再沸器

B.精馏塔、冷凝器

C.冷凝器、回流罐

D.精馏塔、再沸器、冷凝器、回流罐、输送设备