试题与答案

人体细胞中有对染色体,第对染色体是决定人的性别称为。

题型:读图填空题

题目:

人体细胞中有     对染色体,第     对染色体是决定人的性别称为           

答案:

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下面是错误答案,用来干扰机器的。

A、二氧化碳能溶于水,密度比空气的密度大,因此只能用向上排空气法收集,不能用排水法收集,故选项错误;B、实验室是用锌粒和稀硫酸在常温下反应制氢气的,氢气难溶于水,密度比空气的密度小,因此可以用排水法...

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题型:单项选择题 共用题干题

患者女性,43岁,风湿性心脏病史10余年,二尖瓣狭窄,心功能Ⅰ级。口内残根,Ⅰ度松动需要拔除

对于该患者最佳的治疗方案是()

A.分次拔除患牙,术前预防性使用抗生素

B.分次拔除患牙,术后预防性使用抗生素

C.分次拔除患牙,术前术后预防性使用抗生素

D.一次拔除全部患牙,术前预防性使用抗生素

E.一次拔除全部患牙,术前术后预防性使用抗生素

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题型:阅读理解

When people want to know about the weather, they usually go to their radios, TVs, newspapers, or to the Internet. However, you can also find many weather signs among wildlife, because of their highly developed senses. Drops in air pressure produce an effect on small animals in many ways. Mice and deer are good weather indicators. People who spend a lot of time outdoors have observed that, before a storm, field mice come out of their holes and run around. Deer leave high ground and come down from the mountains.

Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways. For example, some birds become irritable(暴躁) and quarrelsome and will fight over a piece of bread. Other birds chirp and sing just before a storm. It seems they know they won’t get another chance for an hour or two. Birds also look for safe places before a storm. You will sometimes see birds settling in trees or gathering together on a wire close to a building. Pre-storm low pressure make the air so thin that birds have difficulty flying.

It is unusual to see many birds flying overhead in the summertime, rather than during the periods in the spring or autumn. Watch for other weather signs if you see this. If they fly in the wrong direction, they may be flying ahead of a storm.

By paying closer attention to some important signs in nature, we can become better prepared for any kind of weather.

小题1:The word “indicators” in paragraph 1 probably means          .

A.maps

B.services

C.signs

D.stations小题2:How can birds sense the coming of a storm?

A.By feeling a drop in air temperature.

B.By noticing the change of wind directions.

C.By feeling a drop in air pressure.

D.By noticing the movements of other animals.小题3:The best title for the text would be        .

A.Signs of a Storm

B.Drops in Air Pressure

C.Animals’ Sharp Senses

D.Nature’s Weather Signs

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题型:选择题

歌曲《我想去桂林》中唱到:“在校园的时候曾经梦想去桂林,到那山水甲天下的阳朔仙境,……有位老爷爷他退休有钱有时间,他给我描绘了那幅美妙画卷,……我想去桂林呀,我想去桂林,可是有时间的时候我却没有钱,我想去桂林呀,我想去桂林,可是有了钱的时候我却没时间”。据此回答

小题1:一般来说,旅游者需要具备的条件是      (   )

①旅游动机  ②旅游伙伴  ③闲暇时间  ④经济条件  ⑤娱乐消遣

A.②③

B.②③④

C.③④⑤

D.①③④小题2:去桂林旅游的基本条件是        (   )

A.交通

B.食宿

C.游览

D.娱乐

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