属于衔接建筑物的有哪些（） A.跌水 B.渡槽 C.倒虹吸 D.陡坎 E.泄洪闸

Everyone has got two personalities (性格) — the one that is shown to the world and the other that is secret and real. You don't show your secret personality when you're awake because you can control yourself, but when you're asleep, your sleeping position shows the real you. In a normal night, of course, you often change your sleeping positions. The important position that best shows your secret personality is the one that you go to sleep.

If you go to sleep on your back, you're a very open person. You normally trust people and you are easily influenced by new ideas. You don't like to make people unhappy, so you never express your real feelings. You're quite shy and you aren't very confident.

If you sleep on your stomach, you are a person who likes to keep secrets. You worry a lot and you're always easily becoming sad. You never want to change your ideas, but you are satisfied with your life the way it is. You usually live for today not for tomorrow.

If you sleep on curled up (蜷缩), you are probably a very nervous person. You have a low opinion of yourself and often protect yourself from being hurt, so you are very defensive. You're shy and you don't usually like meeting people. You like to be on your own.

If you sleep on your side, you have usually got a well-balanced (平衡的) personality. You know your strengths and weaknesses. You're usually careful. You have a confident personality. You sometimes feel worried, but you don't often get unhappy. You always say what you think, even if it makes people angry

小题1:When does the sleeping position best show your secret personality?

A．In the daytime.

B．At the beginning of sleep.

C．At night.

D．During the deep sleep.小题2:Tina hardly tells her secrets to her friends. She probably goes to sleep _____.

A．on curled up

B．on her stomach

C．on her back

D．on her side小题3:What does the word "defensive" mean in the passage?

A．易怒的

B．攻击性的

C．外向的

D．有戒心的小题4:What does the passage tell us?

A．Sleeping on your side is the best way of sleeping.

B．Changing positions will cause sleeping problems.

C．Sleeping positions show people's secret personalities.

D．Enough sleep makes people look better and healthier.

卷扬机所需的功率大致是与荷重与（）的乘积成正比。

A、效果；

B、速度；

C、功率因数；

D、角度。

如上右图所示，一根竖直的弹簧支撑着一倒立气缸的活塞，使气缸悬空且静止。设活塞与缸壁间无摩擦且不漏气，缸壁导热性能良好，使缸内气体的温度保持与外界大气温度相同，且外界气温不变。若外界大气压增大，则下了结论正确的是

A．气缸的上底面距地面的高度将增大，缸内气体分子的平均动能不变

B．气缸的上底面距地面的高度将减小，缸内气体的压强变大

C．活塞距地面的高度将不变，缸内单位体积的气体分子数增加，外界对气体做功

D．弹簧将缩短一些，缸内气体分子在单位时间内撞击活塞的次数增多

肿瘤细胞表面

A．HLA-Ⅰ和Ⅱ类抗原表达均降低

B．HLA-Ⅰ类抗原显著增加

C．HIA-Ⅱ类抗原显著增加

D．HLA-Ⅱ类抗原显著增加

E．HIA-Ⅰ类抗原显著减少

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