构成通信市场的三个要素：一是（）、二是（）、（）。

在学习的过程中，我们会经常碰到一些困难。面对困难，小华和小明有不同的表现：小华总是怨天尤人，认为自己怎么老是碰到困难，因此，意志消沉，不敢面对困难。而小明非常冷静，总是仔细反思自己的不足，努力想办法克服困难。

结合材料，运用所学知识回答：

（1）小华和小明的心理分别属于一种什么的心理品质？

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（2）他们的这种心理品质对他们个人的学习、成长有什么影响？

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2013年3月28日，李克强 * * 在长江三角洲就经济运行情况进行调研并主持召开经济形势座谈会时指出，要根据经济运行中出现的新情况、新问题，有针对地加强和改善宏观调控，及时适度预调微调，扩大内需，促进经济平稳较快发展。李克强讲话所蕴含的哲理是(　　)。

①物质决定意识，一切从实际出发　

②物质运动是无条件的，无从把握　

③具体问题具体分析　

④大胆发挥主观能动性

A．①③

B．②③

C．①④

D．②④

禁止近亲结婚的科学依据是后代（　　）

A．易得传染病

B．得遗传病几率增大

C．成活率极低

D．一定得遗传病

根据短文内容及首字母提示，填写所缺单词。

Malaysia Airlines deeply regrets that MH370 ended in the southern Indian Ocean. MH370 first d__小题1:__ in the early hours of March 8th, while flying from Kuala Lumpur to Beijing.

We should know how to s___小题2:__ ourselves when the crash happened. Australian professor Galea, summed up 6 golden rules after years of research. It might be able to help you escape in case of emergency. S___小题3:__ 1985, Australian professor ED Galea has interviewed 2,000 survivors of 105 plane crashes, searching for the keys to survival.

First, if you are traveling in a f ___小题4:___ group, you should insist that the airline does not separate （分开）you throughout the aircraft. Why? It’s natural that if you’re involved in that kind of situation that you’re going to want to meet the family before you move out.

Second, how do you untie your seat belt in a plane? You press a button. If you can’t untie your seat belt, then, you can’t run away and your c___小题5:__ of survival will drop.

Third, sit within seven rows of an exit and count exactly how many rows you are from the nearest two exits. Count so that you can find an exit in the d___小题6:___.

Fourth, we would all be safer if airline seats faced backward. But the difficulty with this is that the most of the tourists don’t like t___小题7:__ with their back facing the direction of travel.

Fifth, “Smoke is h___小题8:___ to your health. If you take in enough of them, you will die,” explains Galea. You must learn how to use a smoke mask. Otherwise, you’ll waste time trying to put it on -- time that could be used for running a ___小题9:__.

At last, listen to the preflight bricfing by the flight attendants and read the s___小题10:_ instructions. Always be prepared. Good luck to you.

一般来说，北方的群落中，优势种的数目比南方的( )。

A．多
B．少
C．相等
D．看具体情况而定