一般单相隔离开关都用电动、气动或机械传动。( )

It’s the lunchtime break at Shanghai Xianxia Middle School. No mobile phones can be heard ringing anywhere. The common sight of crowds of children chatting on their phones or sending short messages has disappeared(消失).

A grade-2 student said: “I couldn’t concentrate(集中精力) during classes if the phone was with me. I couldn’t help checking if there were messages or missed phone calls. I even played games on the phone sometimes.”

The school leaders say they feel the ban(禁令) is necessary to keep order in class. They even gave out an open letter to remind parents not to let their children bring mobile phones to school. More than 96 percent of parents say they welcome the school decision. The school is also being flexible（灵活的）in implementing the ban. Those students who live far from school are allowed to bring mobile phones to call their parents. But they still have to turn them off in classrooms.

Medical experts(专家) have also welcomed the school decision. They say too much dependence on mobile phones can cause many psychological problems in school students.

小题1:The passage mainly tells us about___________.

A．whether the mobile phone should be used at school by students

B．the harm the mobile phone may cause to middle school students

C．different opinions between school leaders and medical experts

D．a ban on the use of mobile phones by students in a middle school小题2:In paragraph 3, the underlined word “implementing” means ________in Chinese.

A．调整

B．公布

C．执行

D．张贴

请你把下列显微镜的结构及其作用用线连接起来（5分）

个人客户投保时，如投保人和被保险人不是同一人时，需提供双方（）。

古代西洋服装源于哪四个地区？

关于西部大开发战略实施以后东、西部地区合作的说法，错误的是[ ]

A、东、西部地区之间的经济合作明显加快

B、在东、西部地区合作中，对口帮扶成效明显

C、东、西部地区间的合作项目不断增多

D、东、西部地区在合作中拉大了东西差距