扑救极性溶剂B类火灾不得选用的灭火器是( )。A．干粉灭火器 B．卤代烷灭火器 C 发布时间：2017-06-25 17:25 │ 来源：www.tikuol.com 题型：单项选择题 问题： 扑救极性溶剂B类火灾不得选用的灭火器是( )。A．干粉灭火器B．卤代烷灭火器C．CO2灭火器D．化学泡沫灭火器
题型：单项选择题 完形填空。 Red is the color of China. Among all the 1 , red id most easily seen. The color red is fresh and pure, 2 in China we call it China Red. Chinese people are attracted by the color red not only because it makespeople excited, but also because it has 3 meaning in Chinese culture and history. No country in the world has ever 4 a color in such a way as China. Here, red is a symbol.It givescolor to the soul (灵魂) of the nation.In the past, red represented dignity (尊严) and mystery. Even now Chinese people 5 the color much more than we do. It can be said that "China Red" is an everlasting theme for China, and an 6 color for the Chinese people "China Red" has 7 a very popular word, attracting the world's attention. Finding red-colored things in China is very 8 , as you can see the color everywhere. All traditionalred things have been playing special 9 in China, the walls of ancient palaces, the 10 flag, Chineseknots, lanterns, traditional paper- cuts, and even red tauhulu. Red is the color of the 11 , health, harmony, happiness, peace, richness and so on. Only real things and events can fully 12 and explain its beauty. The color can be 13 and meaningful only when it's connected with people. In China, red is more than just a color. It carries the ancient history and 14 of the Chinese nation. China Red is 15 with mysterious charm beyond description and it is right here in China waiting for youto feel, to discover! ( )1. A.colors ( )2. A.but ( )3. A.poor ( )4. A.used ( )5. A.need ( )6. A.interesting ( )7. A.spoken ( )8. A.hard ( )9. A.roles ( )10. A.national ( )11. A.rainbow ( )12. A.believe ( )13. A.large ( )14. A.art ( )15. A.pleased B.news B.or B.rich B.shared B.dislike B.expensive B.said B.easy B.games B.international B.fear B.show B.quiet B.culture B.crowded C.papers C.and C.simple C.drawn C.hate C.easy-going C.become C.sudden C.cards C.local C.worry C.talk C.alive C.business C.filled D.paints D.while D.correct D.affected D.love D.important D.got D.warm D.places D.foreign D.luck D.write D.peaceful D.ability D.satisfied 查看答案
题型：单项选择题 关于家庭电路与安全用电，下列说法中正确的是（ ）A．开关可以装在零线上B．导线绝缘皮破损后仍可接入电路C．使用测电笔时，手不能接触测电笔尾部的金属电极D．使用三线插头时，地线插脚先进入插座 查看答案
题型：单项选择题 尿渗量的表示方法中质量渗摩尔是指（）A.1g水中含有1mol不能电离的溶质时，该溶液的渗量为losm／gH20B.100ml水中含有1mol不能电离的溶质时，该溶液的渗量为1osn-i／100mlH2OC.1ml水中含有1mol不能电离的溶质时，该溶液的渗量为1osm／mlH2OD.1mg水中含有1mol不能电离的溶质时，该溶液的渗量为1osm／mgH2OE.1kg水中含有1mol不能电离的溶质时，该溶液的渗量为1osm／kgH2O 查看答案