近年来，我国大城市的卡拉OK厅数量正在增加。这表明，更多人倾向于选择走出家门进行娱乐活动。
为使上述结论成立，以下哪项陈述必须为真？（）
A.大城市娱乐设施数量并没有大的增加
B.卡拉OK厅在全国的大城市都比其他娱乐方式受欢迎
C.卡拉OK厅数量的增加的同时，其他娱乐设施的数目并没有减少
D.卡拉OK厅得到越来越多年轻人的青睐，因此才越来越火

The worst thing about television and radio is that they entertain us, saving us the trouble of entertaining ourselves.
A hundred years ago, before all these devices were invented, if a person wanted to entertain himself with a song or a piece of music, he would have to do the singing himself or pick up a violin and play it. Now, all he has to do is turn on the radio or TV. As a result, singing and music have declined.
Italians used to sing all the time. Now, they only do it in Hollywood movies, Indian movies are mostly a series of songs and dances trapped around silly stories. As a result, they don't do much singing in Indian villages anymore. Indeed, ever since radio first came to life, there has been a terrible decline in amateur （业余的) singing throughout the world.
There are two reasons for this sad decline. One, human beings are astonishingly lazy. Put a lift in a building, and people would rather take it than climb even two flights of steps. Similarly, invent a machine that sings, and people would rather let the machine sing than sing themselves. The other reason is that people are easily embarrassed. When there is a famous, talented musician readily available by pushing a button, which amateur violinist or pianist would want to try to entertain family or friends by himself？
These earnest reflections came to me recently when two CDs arrived in the mail. They are historic recordings of famous writers reading their own works. It was thrilling to hear the voices from a long dead past in the late 19th century. But today, reading out loud anything is no longer common. Today, we sing songs to our children until they are about two, we read simple books to them till they are about five, and once they have learnt to read themselves, we become deaf. We're alive only to the sound of the TV and the stereo （立体声音响).
I count myself extremely lucky to have been born before TV became so common: I was about six before TV appeared. To keep us entertained my mother had to do a good deal of singing and tell us endless tales. It was the same in many other homes. People spoke a language; they sang it, they recited it; it was something they could feel.
Professional actors' performance is extraordinarily revealing. But I still prefer my own reading, because it's mine. For the same reason, people find karaoke （卡拉OK) liberating. It is almost the only electronic thing that gives them back their own voice. Even if their voices are hopelessly out of tune, at least it is meaningful self-entertainment.
The main idea of this passage is that ______.
A．TV and radio can amuse us with beautiful songs and music
B．TV and radio prevent us from self-entertainment
C．people should sing songs and read books aloud themselves
D．parents should sing songs and read books aloud to their children

A.大城市群往往是一个国家或一个大区域进入世界的枢纽

B.大城市群是世界进入该国家和区域的门户

C.大城市群是一个国家或区域的增长地

D.大城市群是最具发展活力和竞争力的区域

A42000元

B43000元

C44000元

D45000元

某建筑高度为98.9m的大楼，使用功能为办公，宾馆，商业和娱乐。一至四层的裙房设有营业厅和办公室；地下一层夜总会疏散走道两侧和尽端设有5个卡拉ok小包间，营业厅的2个疏散门需要通过疏散走道至疏散楼递间。该建筑按照规范要求设置消防设施。下列建筑内疏散走道设计中，错误的是（）？

A、办公区域疏散走道两侧的隔墙采用加气混凝土块砌筑，耐火极限为1.50h

B、宾馆区域疏散走道采用轻钢龙骨纸面石膏板吊顶，耐火极限为0.3h

C、夜总会疏散走道尽端房间房门至最近的安全出口的疏散走道长度为15m

D、裙房内营业厅的疏散门至最近的安全出口疏散走道长度为15m