搜题请搜索小程序“爱下问搜题”
问题 选择题

在10-9-10-7m范围内，对原子、分子进行操作的纳米超分子技术往往能实现意想不到的变化．如纳米铜颗粒一遇到空气就会剧烈燃烧，甚至发生爆炸．下列说法中正确的是（　　）

A．纳米铜属于化合物

B．纳米铜颗粒比普通铜更易于氧化产生化学反应

C．纳米铜与普通铜所含铜原子的种类不同

D．纳米铜保存方式普通铜相同

答案

答案：B

阅读理解

Welcome to England! The weather of England is very changeable.

It can be rainy, sunny, windy, warm, foggy or cold at any time of year. If it’s raining when you get up in the morning, it can be hot and dry by the afternoon. The west of England is wetter than the east, and the north is cooler than the south. Just be ready for any kind of weather.

In England, shops are usually open from 9:00 am to 5:30 pm. On Sundays, some shops are open from 10:00 am to 4:00 pm. But a lot of shops are closed. Banks, museums of other places are open from 10:00 am to 5:00 pm. You can go to the parks at anytime.

All the cities have buses, trains and taxis. People wait in line for buses and they are unhappy if you push in at the front. Don’t forget this---traffic goes on the left.

Be careful!
查看答案
单项选择题

下面关于城市用地布局中要贯彻留有余地的原则，表述错误的是( )。

A．规划和征用城市建设用地时要多征用一些用地，以应付未来用地需要
B．城市空间布局要加强适应性，使之在不同发展阶段和不同情况下都相对合理
C．城市当前发展必须集中紧凑，同时要为今后用地的发展、开拓新区创造条件
D．规划布局中某些一时无法实现的合理设想，要留有发展余地以便今后有可能实现
查看答案