简述造成信号波动的可能原因

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问题:

简述造成信号波动的可能原因

考点:移动联通网络知识考试华为BTS设备基础维护知识华为BTS设备基础维护知识题库
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Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned(禁止)students from carrying mobile phones during school hours.

Mobile phone use among (在….之间)children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students will want them.

Mary Bluett,an official,said mobile phone use is a distraction(分心) to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams.

She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn’t get in touch with their children.

Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school office. They also said there were many reasons why the students should not have mobile phones at school:they were easy to lose and were a distraction from studies.

Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.

小题1:Some middle schools in Australia have banned students from carrying mobile phones______。

A. because they are students

B. when they are free

C. when they are at school

小题2:We know from the passage that some children get mobile phones from_______。

A. the makers and sellers

B. the passers-by(路人) and strangers

C. their parents and friends

小题3: What does the underlined word cheat mean in the passage?

A.聊天            B.作弊           C.查询

小题4:Some parents felt unhappy because they couldn’t_______ during school hours.

A. use their mobile phones

B. leave their mobile phones at school office

C. get in touch with their children

小题5:The passage tells us that _______。

A. students shouldn’t have mobile phones at school except for some special reasons

B. it is impossible to ban students from using mobile phone at school

C. some parents felt unhappy because they couldn‘t use their phones at school

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急性ITP初次激素治疗的疗程一般不超过()

A.3天

B.7天

C.2周

D.3周

E.4周

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牛的心跳次数是( )。

A.30~60次/分

B.40~70次/分

C.50~80次/分

D.40~80次/分

E.30~50次/分

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根据著作权法及相关规定,下列说法哪些是正确的

A.只有电影作品和以类似摄制电影的方法创作的作品才享有出租权

B.展览权是指公开陈列美术作品、摄影作品原件或者复制件的权利

C.发表权是决定作品是否公之于众的权利

D.修改权是指改变作品,创作出具有独创性的新作品的权利

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“旁边有一段低低矮墙,挡住了个弹三弦的人,却不能隔断那三弦激荡的声浪”。这些诗句出自()。

A.周作人的《小河》

B.沈尹默的《三弦》

C.刘半农的《相隔一层纸》

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