经常参加体育锻炼,可以提高适应繁重和持久工作的能力是因为 [ ] A.心脏增大,

题型:选择题

问题:

经常参加体育锻炼,可以提高适应繁重和持久工作的能力是因为  [ ]

A.心脏增大,肺泡数目增多

B.心肌和呼吸肌的收缩力量增加

C.心肌数目增多,肺泡壁变薄

D.心脏内血流量增多,肺泡外毛细血管增多

考点:心脏的结构和功能
题型:选择题

如果平面α平面 β 且直线l⊥α,那么直线l与平面β 的位置关系是______.

题型:选择题

理解课文内容,选择正确答案。 

1.“爸爸等于给我说了一个谜”,这个谜是:   [ ]

A.死去的永远不会回来。

B.要珍惜宝贵的时间。

2.“我”和时间赛跑最有意义的是:  [ ]

A.能早点回到家里。

B.这样的游戏给“我”带来了快乐和成功。

C.十天做完了一个假期的作业,读三年级能做五年级的作业。

题型:选择题

颌下间隙感染处理方法不包括

A.早期切开引流

B.全身应用抗生素

C.等待波动出现时切开引流

D.影响呼吸时,应早期行气管切开术

E.切开引流时需切开下颌舌骨肌

题型:选择题

根据短文内容及首字母提示,填写所缺单词

In modern society the competition is so enough, but team spirit can lead us to success. Team spirit means the willingness of people to work t小题1: and help each other as part of a team. With this spirit, people try hard to make their team the best of all. E小题2:  has experienced team spirit one way or another, whether they were part of a team or saw a group of people cheer for their f小题3:  player.

There are different kinds of team spirit. One kind is the connection between a team of people because their efforts and cooperation(合作) are n小题4: in reaching a particular goal. Another kind is when a group of people support a person or a team. Another is people’s natural love for and pride in their country, w小题5:  all the people of the nation cheer for their country in competitions.

Team spirit creates various good effects. It creates friendship and trust(信任) between people who may not get along well when they don’t have such team spirit. There may also be bad effects. Too great team spirit may c 小题6:   fights or quarrels with other team members.

Some people don’t u小题7:  team spirit properly. They think team spirit means having to become a m 小题8: of a team or a fan club. In fact, team spirit can be built anywhere---between friends, coworkers or e 小题9:  between two people sitting next to each other. You don’t h小题10: to wear the team spirit clothes. Anyone can show team spirit just by showing support for the goal.

题型:选择题

保险合同与一般经济合同相比具有特殊性,具体体现在( )。

A.公平性与自愿性
B.诚信性与法律性
C.附和性和射幸性
D.互利性与保障性

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