同期登记对于每一项经济业务，一方面要在有关的总分类账户中登记，另一方面要同时在有关总

伴随着智能手机的普及运用，手机上网对中学生来说已不再是个新鲜词。阅读材料，回答问题。

材料一：小明是班长，每周两次的读报课，同学们心不在焉的样子总是让他很头疼。但自从他在星期天利用手机收听了人民网、新华网、《读者》、《青年文摘》等微博后，及时、短小、有趣、丰富的资讯让小明把沉闷的读报课变成了有趣有益的“读微课”。

材料二：上课刷微博、晚上就寝摇微信、QQ聊天、玩游戏、看电子书、在网上吐槽、上网浏览不良信息……手机这个美丽的终端让一些同学任意地永远在线。严重影响了学业与身心健康。

（1）材料一、二共同反映了网络交往的什么特点？（2分）

（2）根据上述两则材料，谈谈我们应如何正确处理网络与学习的关系？（6分）

材料三：八年级学生小丽是个“手机控”。通过微信摇一摇，她认识了小Q，视小Q为知己，两人在微信上无所不聊。有一次小Q向小丽发出了约会的邀请，小丽犹豫了……

（3）假如你是小丽的朋友，请你运用所学知识给小丽一些善意的忠告。（4分）

放射性核素89Sr的物理半衰期(T1／2)为_______，90Sr的T1／2为_________。

“Everybody in this city wants a car, and I’m no exception. A car brings with it the freedom to travel”, said a friend of mine while reading a car magazine. I might not agree with him, but no doubt he was speaking for a rapidly growing number of middle-class Chinese. While it is true that all the waiting, walking, being part of a crowd, and sweating, are somewhat unpleasant, there are many problems which can arise when our lives rely too much on this invention.

First of all, in terms of polluting the environment, driving a car is the worst act an average person can commit. Beijing now finds itself at the top of the list of the most polluted capital cities in the world with Mexico City in the second place. Research also shows that by 2010 around 90% of total pollutants in Shanghai have come from cars. These pollutions are extremely dangerous to our health. They can damage the lungs, cause cancer, and damage the brain.

Apart from environmental problems, relying too much on cars also creates social problems such as traffic jams, road accidents, and noise pollution. The jeeps that proudly drive through the Hutongs in Beijing as if they are in a race often annoy me, and to make it worse, these drivers seldom respect cyclists.

Of course, we cannot forget the convenience that cars bring us when we need to travel far, but I often find it faster to cycle from one place to another within the city of Beijing, especially with the growing traffic jams.

Since people travel further and more frequently than before, cars will certainly be important in the future. At the same time, however, let us work hard to make sure that this invention brings us a more convenient lifestyle rather than trouble and disease. Let us make good use of cars.

小题1:What is this passage mainly about?

A．Environmental problems.

B．Traffic jams in Beijing.

C．Problems brought about by cars.

D．Benefits of using cars.小题2: The underlined word commit in Paragraph 2 has the close meaning as ____ .

A．do something right or legal

B．do something wrong or illegal

C．do something good and meaningful

D．do something bad and meaningless小题3:What do we know about the author?

A．The author doesn’t want a car.

B．The author agrees that a car offers freedom to travel.

C．The author suggests that we should rely on bicycles.

D．The author thinks that the invention of cars leads to many problems.小题4:In Paragraph 3, what does the author mean by saying “The jeeps… often annoy me”?

A．The author is troubled by the way jeeps are driven in the Hutongs of Beijing.

B．The author thinks that Hutongs are too narrow for jeeps to drive through.

C．The author thinks that the jeeps are too noisy.

D．The author is worried that more accidents are caused by jeeps than any other cars.小题5:What is the author’s idea in Paragraphs 4 and 5 ?

A．Cars are only convenient for people traveling far.

B．We should all give up cars and ride bicycles.

C．Cars have brought us more convenience than troubles.

D．We should choose between the car and the bicycle according to the situation.

用人单位在（）情况下，可以单方解除劳动合同。

A.劳动者在试用期间被证明不符合录用条件的

B.严重失职，对用人单位造成重大损失的

C.严重违反劳动纪律的

D.被依法追究刑事责任的

FTTH小区，用户申告网速慢，有可能是（）

A.用户路由器限速

B.用户电脑中病毒

C.光衰大

D.多终端同时上线工作导致