对于人类青春期的生长发育过程起重要调节作用的生长激素和性激素,从其化学成分上分析

题型:选择题

问题:

对于人类青春期的生长发育过程起重要调节作用的生长激素和性激素,从其化学成分上分析[ ]

A.都是蛋白质

B.前者是蛋白质,后者是固醇

C.都是脂质

D.前者是固醇,后者是蛋白质

考点:脂质的种类和作用
题型:选择题

默认情况下,在Excel单元格中靠左对齐的数据为()。

A.文本

B.数值

C.日期

D.时间

题型:选择题

In the animal kingdom, weakness can bring about aggression in other animal. This sometimes happens with humans also. But I have found that my weakness brings out the kindness in people. I see it every day when people hold doors for me, pour cream into my coffee, or help me to put on my coat. And I have discovered that it makes them happy.

From my wheelchair experience, I see the best in people, bur sometimes I feel sad because those who appear independent miss the kindness I see daily. They don’t get to see this soft side of others often, we try every way possible to avoid showing our weakness, which includes a lot of pretending. But only when we stop pretending we’re brave or strong do we allow people to show the kindness that’s in them.

Last month, when I was driving home on a busy highway, I began to feel unwell and drove more slowly than usual. People behind me began to get impatient and angry, with some speeding up alongside me, horning (按喇叭) or even shouting at me. At the moment I decided to do something I had never done in twenty fore years of driving. I put on the car flashlights and drove on at a really low speed.

No more angry shouts and no more horns! When I put on my flashlights, I was saying to other drivers, “I have a problem here. I am weak and doing the best I can.” And everyone understood. Several times, I saw drivers who wanted to pass. They couldn’t get around me because of the stream of passing traffic. But instead of getting impatient and angry, they waited, knowing the driver in front of them was in some way weak.

Sometimes situations call for us to act strong and brave even when we don’t feel that way. But those are and far between. More often, it would be better if we don’t pretend we feel strong when we feel weak or pretend that we are brave when we are scared.

小题1:How do people feel when they offer their help?(No more than 2 words)

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小题2:What reaction did other drivers have when the author drove very slowly at first? (No more than 5 words)

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小题3:Why did other drivers behave differently when the author put on the car flashlights? (No more than 8 words)

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小题4: What does the author advise us to do at last? (No more than 8 words)

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题型:选择题

心脏房室延搁的生理意义是()

A.保证心室肌不会产生完全强直收缩

B.增加心脏收缩力

C.使心室肌有效不应期延长

D.保证心房收缩完成以后心室再收缩

E.降低心肌肉收缩力量

题型:选择题

下列哪个方程式可表示焦炭的燃烧性。()

A、C+CO2=CO

B、C+O22=CO2

题型:选择题

建筑屋顶利用太阳能的方式有以下哪几种()

A.太阳能被动制冷屋顶

B.太阳能热水器屋顶

C.太阳能主动制冷屋顶

D.太阳能光电屋顶

E.太阳能非光电屋顶

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