如图,悬挂在天花板下重60N的小球,在均匀的水平风力作用下偏离了竖直方向 30°

题型:计算题

问题:

如图,悬挂在天花板下重60N的小球,在均匀的水平风力作用下偏离了竖直方向

30°角.求风对小球的作用力和绳子的拉力.

考点:共点力的平衡
题型:计算题

会计信息系统根据信息技术的影响程度可划分为()。

A.手工会计信息系统

B.传统自动化会计信息系统

C.现代会计信息系统

D.人机系统

题型:计算题

大柴胡汤的药物组成中,不包括的药物是

A.芍药

B.大黄

C.枳实

D.人参

E.生姜

题型:计算题

One of India's top engineering schools has restricted Internet access in its boarding houses, saying addiction to surfing, gaming and blogging was affecting students' performance, making them lonely and even suicidal.

Authorities at the best Indian Institute of Technology (IIT) in Mumbai said students had stopped socializing and many were late for morning classes or slept through them. "Now, a student doesn't even know who lives two doors away from him because he is so busy on the Internet," said Prakash Gopalan, dean of student affairs. "The old dormitory culture of companionship and socializing among students is gone. This is not healthy in our opinion."

IIT-Mumbai, with about 5,000 students, is one of seven IITs across India which are considered to be among the finest engineering schools in the world. They are also a talent pool for global technology giants. But their hard courses, tough competition and lonely campus lifestyle have taken an effect on students. Depressive and dysfunctional (不正常的) lifestyles are known to be common among IIT students, and at least nine have committed suicide in the past five years. Students have unlimited free Internet access in their boarding houses to help them in their studies, but many also use it to surf, chat, download movies and music, blog and for gaming.

Starting Monday, Internet access will be banned between 11 p.m. and 12.30 p.m. at IIT-Mumbai's 13 boarding buildings to encourage students to sleep early and to try and force them out of their "shells," Gopalan said. But the move has not gone down well with students who say they hate their lives being regulated. "Now they will say we need to listen to a lullaby (摇篮曲) to go to sleep," said Rajiv, an electronics student.

小题1:Which of the following is not the possible effect of free Internet access on students?

A.There has been a decline in students’ lessons.

B.Participation in social activities has gone down.

C.Some students feel lonely and even suicidal.

D.Students don’t even know his classmates.小题2:What measure has been taken in IIT- Mumbai?

A.Students have unlimited free Internet access in their dormitories.

B.Students are forbidden to surf the Internet.

C.Internet access is unavailable in deep night.

D.Students must go to bed before 11 p.m.小题3:In the passage the students are told to _____.

A.sleep through their lessons

B.break away from the Internet

C.go to sleep along with music

D.stop surfing, make friends小题4: We may infer from the last paragraph that _____.

A.the banning order causes some complaints among the students

B.all electronics students hate the banning order

C.more students prefer listening to music to surfing the Internet

D.there is no Internet access on the IIT campus even since.

题型:计算题

《变电站计算机监控系统工厂验收管理规程》规定,变电站计算机监控系统主、备用机切换时间小于或等于()秒

A.5

B.10

C.15

D.20

题型:计算题

下列对于护士姿态的描述正确的选项是

A.行走时步幅大而均匀,步速稍快

B.坐姿时背部向前倾斜与大腿成锐角,双膝并拢

C.行走时双臂自然摆动

D.站立时双手可自然下垂或在体前交叉

E.站立时收腹挺胸,脚尖和脚跟均并拢

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