不得在市场上销售或者变相销售的是（） A.新药 B.处方药 C.非处方药 D.医疗机

阅读理解。

     If you live in a place like Britain, you could not help thinking that the weather is random (随意的). This

is because the weather there seems to change daily if not hourly. In fact the weather is controlled (控制) by

systems which move around areas of the earth. In the UK the weather depends on depressions, often called

"lows", and anticyclones, also known as "highs". These systems start in the Atlantic Ocean, and make their

way across the British Isles from the west to the east. Highs bring sunny weather, while lows bring rain and

wind.

     The weather systems in tropical climates are very different from those in mid and high latitudes (纬度).

Tropical storms develop from depressions, and often build into cyclones, violent (猛烈的) storms, great

hurricanes and torrential rain.

     In modern times, human activity seems to be changing weather patterns. Gases or smoke produced by

heavy industry (工业) change the temperature of the earth's surface, and affect cloud formation (形成).

Some researchers say that factories in Europe and North America may have been one of the causes of the

droughts in Africa in the 1980s.

根据短文内容，判断下列句子正（T）误（F）。

( )1. The weather in Britain is very changeable.

( )2. Violent storms are common in mid and high latitudes.

( )3. Anticyclones bring fine weather.

( )4. The word torrential in Paragraph 2 means very heavy.

( )5. Climate changes as a rule and can't be affected by man.

麦冬在采收加工时应（）

A.低温干燥

B.蒸透心，敞开低温干燥

C.发汗后再晒干或烘干

D.反复曝晒、堆放至七八成干，再干燥

E.阴干

A={x|x＜100且为质数}，在A上定义*和·如下：x*y=max(x，y)，x·y=LCM(x,y)，

x，y∈A，这里LCM(x,y)表示x与y的最小公倍数，则下面命题正确的是　　Ⅰ．＜A，*＞构成代数系统：　　Ⅱ．＜A，·＞构成代数系统；

A．只有Ⅰ

B．只有Ⅱ

C．Ⅰ和Ⅱ

D．没有

1936年，假如你踏上苏联的国土，你能看到的是

①农民在集体农庄的田间用餐②农民在市场里自由贸易③书店里有新出版发行的新宪法④苏联军民开始抗击德国法西斯[ ]

A．①②

B．②③

C．①③

D．③④

汽轮机打闸停机时，对低压胀差影响最大的是（）

A.端部轴封漏汽损失

B.汽缸散热损失

C.鼓风摩擦损失

D.湿汽损失