对于机器浸焊设备,为了保证焊接质量应() A.提高设备功能 B.在使用过程中不断调整

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问题:

对于机器浸焊设备,为了保证焊接质量应()

A.提高设备功能

B.在使用过程中不断调整

C.设定参数不变

D.及时进行用前和用后的保养维护

考点:电子设备装接工电子设备装接工(综合练习)电子设备装接工(综合练习)题库
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根据《城市排水工程规划规范》的规定,城市污水处理一般应达到()生化处理标准。

A.特级

B.一级

C.二级

D.三级

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Do you know Australia? Australia is the largest island in the world. It is a little smaller than China. It is in the south of the earth. Australia is big, but its population is not large. The population of Australia is nearly as large as that of Shanghai.

The government has made enough laws to fight pollution. The cities in Australia have got little air or water pollution. The sky is blue and the water is clean. You can clearly see fish swimming in the rivers. Plants grow very well.

Last month we visited Perth, the biggest city in Western Australia, and went to a wild flowers’ exhibition. There we saw a large number of wild flowers we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. In spring every year Perth has the wild flowers’ exhibition. After visiting Perth, we spent the day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves. Suddenly we heard bells ringing at the top of the hill. What we saw made us pick up all our things and run back to the car as quickly as we could. There were about three hundred sheep coming towards us down the path.

Australia is famous for its sheep and kangaroos(袋鼠). After a short drive from any town, you will find yourself in the middle of white sheep. Sheep, sheep, everywhere are sheep.

小题1:Australia is _______.

A.the largest country in the world

B.as large as Shanghai

C.not as large as China

D.the largest island in the north of the earth小题2: The government had made _______.

A.too enough laws to fight pollution

B.so many laws that it can fight pollution

C.enough laws that it can hardly fight pollution

D.enough laws because the pollution is very serious小题3: Which of the following is NOT true?

A.Perth is famous for its beautiful wild flowers.

B.Perth is bigger than any other city in Western Australia.

C.Perth lies in the west of Australia.

D.No other city is larger than Perth in Australia.小题4: Which of the following is true?

A.Australia is famous for its sheep, kangaroos and wild flowers.

B.We ran back to the car because we were in the middle of white sheep.

C.Three hundred sheep came towards us because they saw us.

D.If you go to the countryside in Australia, you will see a large number of white sheep.

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患者,女,28岁。乏力半年。因发作性手足搐搦伴软瘫3次就诊。体检:神志清楚,对答切题。四肢不能自主运动,肌力Ⅱ度,无明显肌萎缩。血压24/14.6kPa(180/110mmHg),心率92次/分,律齐。

患者此时血钾报告为2.5mmol/L,24小时尿钾30mmol/L,为了进一步明确诊断,应选择下列哪项检查()

A.血管紧张素Ⅱ加血钠测定

B.ACTH兴奋试验

C.地塞米松抑制试验

D.胰岛素低血糖兴奋试验

E.肾素-血管紧张素-醛固酮测定

题型:单项选择题

阿拉丁在()岁那年遇到了远来的“伯父”。

A.10

B.15

C.12

题型:单项选择题

下列有关描述不正确的是()

A.生态系统中生物种类越多,自动调节能力越强,抵抗力稳定性越大

B.有些植物,如莴苣、茄、烟草的种子必须接受一定的信息素才能萌发

C.生态系统稳定性调节的原理是负反馈调节

D.物理信息的来源可以是无机环境,也可以是生物

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