理想干燥过程有哪些假定条件？

下面是某初级中学的生物兴趣小组操作的“绿叶在光下制造有机物”的各实验步骤示意图，请结合所学据图回答：

（1）在步骤①中，将植物放在暗处24小时的目的是______；

（2）在步骤②中，从叶片上下两面遮盖黑纸片的目的是设置一组______实验，这组实验的变量是______．

（3）在步骤⑥中，滴加碘液的目的是为了检验光合作用制造的有机物是______．

若关系R和S，T如下图所示，则是执行了哪种操作才得到T

A．

B．

C．

D．

In modern society there is a great deal of argument about competition. Some value it highly, believing that it is responsible for social progress and prosperity, others say that competition is bad; that it sets one person against another; that it leads to unfriendly relationship between people.

I have taught many children who held the belief that their self – worth relied on how well they performed at tennis and other skills. For them, playing well and winning are often life – and – death affairs. In their single – minded pursuit (追求) of success, the development of many other human qualities is sadly forgotten.

　However, while some seem to be lost in the desire to succeed, others take an opposite attitude. In a culture which values only the winner and pays no attention to the ordinary players, they strongly blame competition. Among the most vocal are youngsters who have suffered under competitive pressures from their parents or society. Teaching these young people, I often observe in them a desire to fail. They seem to seek failure by not trying to win or achieve success. By not trying, they always have an excuse: “I may have lost, but it doesn’t matter because I really didn’t try.” What is not usually admitted by themselves is the belief that if they had really tried and lost, that would mean a lot. Such a loss would be a measure of their worth. Clearly, this belief is the same as that of the true competitors who try to prove themselves. Both are based on the mistaken belief that one’s self – respect relies on how well one performs in comparison with others. Both are afraid of not being valued. Only as this basic and often troublesome fear begins to dissolve (缓解) can we discover a new meaning in competition.

小题1:What does this passage mainly talk about?

A．Competition helps to set up self – respect.

B．Competition is harmful to personal quality development.

C．Opinions about competition are different among people.

D．Failures are necessary experiences in competition小题2:Why do some people favor competition according to the passage?

A．It improves personal abilities.

B．It builds up a sense of duty.

C．It pushes society forward.

D．It encourages individual efforts.小题3:The underlined phrase “the most vocal” in Paragraph 3 means ___________.

A．those who try their best to win

B．those who value competition most highly

C．those who rely on others most for success

D．those who are against competition most strongly.小题4:Which point of view may the author agree to?

A．Fear of failure should be removed in competition.

B．Competition should be encouraged.

C．Winning should be a life – and – death matter.

D．Every effort should be paid back.

新的学习需要可以通过两条途径来形成：直接发生途径和______转化途径。

飞行申请的内容包括：（）。

A.任务性质、航空器型别、装载情况、飞行范围、起止时间、飞行高度和飞行条件

B.任务性质、航空器型别、飞行范围、起止时间、飞行高度和飞行条件

C.任务性质、航空器型别、装载情况、起止时间、飞行高度和飞行条件