根据《建筑设计防火规范》的规定，有爆炸危险的甲、乙类厂房，宜采用（），钢柱宜采用防火

下列各项制作过程中利用微生物发酵获得的是

①碘盐、食用油       ②酸醋、葡萄酒    ③酱油、甜面酱   ④花椒、大茴香（　　）

A．①②

B．②③

C．③④

D．④①

根据显现强度及其对煤和岩层、支架、设备的破坏程度分冲击地压可分为（）、煤炮、微冲击、强冲击。

More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment. Maybe that’s why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can take you almost anywhere, and there is no oil cost!

Get on a bicycle and ride around your neighbourhooD. You may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and benefit (受益) from the enjoyable exercise without polluting the environment. You don’t even have to ride all the way.

Folding (折叠) bikes work well for people who ride the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with you when you fly. But be sure to look for information by getting on airline websites. Not all airlines are bicycle-friendly to travelers.

Health Benefits of Bicycling.

·It helps to prevent heart diseases.

·Bicycling helps to control your weight.

·A 15-minute bike ride to and from work three times a week burns off five kilos of fat in a year.

·Bicycling can improve your mood (心情).

·Exercise like bicycling has been shown to make people feel better, more relaxed and self-confident.

·Bicycling is healthier than driving.

One of the benefits from bicycling is that（）。

A. you can fold the bicycle

B. you will be friendly to others

C. you will be more relaxed

D. you may get fatter and fatter

在Photoshop CS中，（）操作可以将图层自动对齐和分布。

A.调节图层

B.链接图层

C.填充图层

D.背景图层

治疗杀虫脒中毒哪项是错的（）

A.迅速脱离中毒环境

B.高铁血红蛋白症的发绀可用小剂量亚甲蓝治疗

C.输液加速毒物排出

D.无发绀患者使用亚甲蓝治疗

E.对症治疗