下列事实说明空气中含有哪些成分? ①石灰水长期露置在空气中会出现白色固体,说明空

题型:填空题

问题:

下列事实说明空气中含有哪些成分?

①石灰水长期露置在空气中会出现白色固体,说明空气中含有______;

②空气是制造氮肥的原料______;

③夏天盛放冰棒的杯子外壁附有水珠,说明空气中含有______;

④小白鼠在装有空气的密闭容器中可存活一段时间,说明空气中含有______.

考点:空气的成分
题型:填空题

阅读理解。

     Jack lived in a town in the north. He wanted to visit some places in the south, but he didn't want to spend

too much money.

     Last summer he had a short vacation. He decided to take a trip to Hainan. He talked to a friend about his

plan. His friend said, "It's a long journey. If you go by plane, you'll get there in a few hours. Then you'll have

more time for sightseeing. If you go by train, it'll take you five or six days to get there."

     He left at the beginning of June and got back to work in the middle of the month. It took him more than

two weeks to make the grip.

     What was the matter? He went by ship for most of the journey.

1. Where did Jack live?

A. In the north.

B. In the south.

C. In the east.

D. In the west.

2. Where did he decide to take a trip?

A. In Hainan.

B. In Hang Hangzhou.

C. In Qingdao.

D. In Beijing.

3. When did he get back to work at last?

A. At the beginning of June.

B. In the middle of June.

C. At the end of June.

D. I don't know.

4. How long did it take him to make the trip?

A. Two days.

B. Less then two weeks.

C. Two weeks.

D. More than two weeks.

5. How did he go for most of the journey?

A. By bus.

B. By plane.

C. By ship.

D. By bike.

题型:填空题

一个完整的调查方案应该包括调查目的、调查对象和调查单位、调查表、调查方法和组织方式以及调查经费预算。()

题型:填空题

现在许多宾馆都利用房卡取电,只有把房卡插入槽中,房间内的用电器才能使用.房卡的作用相当于家庭电路中的______,房间里各用电器之间是______联的.汽车在转向前,司机会拨动方向盘旁边的横杆,汽车同侧的前后两个转向灯就会同时闪亮、同时熄灭,这两个转向灯在电路中的连接方式为______;司机所拨动的这根横杆就相当于电路中的______.

题型:填空题

患者,男性,30岁,近2月出现腹痛,位于上腹部偏右,多发生于空腹及夜间,体重减轻不明显,进食后缓解,Hb95g/L,大便潜血(++)。

对于诊断此种疾病最有意义的检查是()。

A.X线钡餐

B.胃镜

C.CT

D.MRI

E.腹部B超

题型:填空题

符合浸润性肺结核的是()

A.男,36岁,咳嗽、高热4天,右肺上叶斑片影,抗炎治疗后明显吸收 

B.男,54岁,咳嗽、痰中带血2个月,右肺上叶大片状密度增高影,其下缘呈反S形,抗炎治疗后,病灶变化不明显 

C.女,24岁,咳嗽、低热1个月,右肺上叶斑片影,常规抗炎无明显吸收 

D.男,60岁,声嘶2个月,右肺尖肿块影 

E.女,70岁,查体胸片示右肺上叶索条影,其内见钙化

更多题库