在百度搜索框中输入两个检索词，中间用空格连接，体现的是布尔逻辑（）关系A、或 B、且C

发于皮里膜外，筋肉骨节之间的，或软或硬、按之有囊性感的包块称为（）

A.瘤

B.痰

C.瘿

D.疽

E.岩

Most people work or study from Monday to Friday. The weekend is usually a time of rest. But today's Chinese teenagers can hardly rest during the weekends.

According to a survey, 24% of the Grade 8 students in Beijing have classes at the weekend. Over 40% of the middle school students have less than eight hours’ sleep each night because of study.

And this isn't only in Beijing. Ji Chunying is a Grade 9 student in Guangzhou. The 14-year-old girl has to get up at 6:45 am on Saturday. Then she has a whole day of classes. On Sunday, she goes to extra classes for math and physics.

But Ji doesn't complain. She says her classmates all work very hard.

Finding time to have fun

Zhao Yang, 13, is from Dalian, Liaoning. As a Grade 8 student, Zhao's weekend is less busy. But he still spends Saturday in school. On Sunday, after finishing homework, he plays basketball. "I feel happy because I still have time to do the things I like," he said.

Some students are much luckier. They don't have to go to school on the weekend.

Ding Yi, a Grade 8 student from Laiwu, Shandong, is one of them. And she's a top student.

During the weekend, Ding usually gets up at 8 am. Then she spends some time doing homework. After that she is free to go shopping or watch TV.

Ding said her mother once wanted her to try extra classes. But when they asked Ding's teacher about it, the teacher said it was unnecessary.

"My teacher said I don't need to push myself too much. Learning well at school is enough," Ding said. "I feel pretty lucky."

小题1:Over 40% of the middle school students have less than eight hours sleep each night because of ___________.

A．playing computer games

B．playing with friends

C．busy study

D．watching TV小题2:How many students are mentioned in this passage?

A．2.

B．3.

C．4.

D．5.小题3:We can learn from the passage that ___________.

A．Some middle school students can enjoy their weekend.

B．All the students in China are busy studying on the weekend.

C．Every student in China has to go to extra classes on the weekend.

D．All the students complain about their busy weekend.小题4:The above text may be a _______.

A．a story of science

B．school notice

C．short play

D．news report

各国普遍采用确定本国货币与其他货币汇率的体系，被称为（）。

A.利率制度

B.汇率制度

C.外汇制度

D.货币制度

治疗盗汗或热病汗不出，应首选

A．大椎

B．风池

C．复溜

D．太溪

E．合谷

测定溶解氧时，哪些水样需要接种？哪些废水需要进行菌种的驯化？