药品出库时必须停止发货或配送的是 A．药品包装内有异常或液体渗漏 B．外包装出现破损

对（）的辨别能力是幼猫最重要的感觉之一。

A、气味

B、温度梯度

C、湿度梯度

D、乳剂

太平天国运动遇到了中国历史上任何一次农民战争不曾遇到的新情况，这就是(    )   

A．清政府军队和地方地主武装联合 * *

B．内部矛盾斗争导致队伍分裂

C．期受到敌人的围困和封锁

D．外反动势力联合绞杀

图为测定运动员体能的装置，轻绳拴在腰间沿水平线跨过定滑轮（不计滑轮的质量与摩擦），下悬重为G的物体。设人的重心相对地面不动，人用力向后蹬传送带，使水平传送带以速率v逆时针转动。则

A．人对重物做功，功率为Gv

B．人对传送带的摩擦力大小等于G，方向水平向左

C．在时间t内人对传送带做功消耗的能量为Gvt

D．若增大传送带的速度，人对传送带做功的功率不变

减速手信号昼间无黄色信号器时，用（）信号旗下压数次。

A．红色

B．黄色

C．绿色

阅读理解

     Scientists have found that human eyes are more likely to be damaged by UV rays (紫外线) while

skiing in the snow-covered areas than sitting on the beach, according to a report by the UK newspaper

The Telegraph.

     The researchers at Kanazawa Medical University, Japan and American company Johnson

     Johnson conducted the study together. They looked at the effects of light reflection on newly fallen

snow on a ski trail (a rough path) in Ishikawa District, northern Japan. They compared the results with the

levels of UV rays on a sand beach in southern Japan's Okinawa District.

     They found that on the beach, eyes are exposed to a daily 260 kilojoules (千焦耳) of UV a square

meter compared to 658 kilojoules in snow-covered areas.

     The findings are supported by the Japan Meteorological Agency. According to the agen- cy, the

reflection rate of UV light on beaches is often between 10 and 25 percent, compared to 80 percent in the

new snow areas. The amount of light increased 4 percent with a 300-meter rise in height.

     Most of us know that UV rays can harm the skin. That's why we wear sunscreen on our skin before we

get out in the sun. But many of us may not realize that UV rays are also harmful to the eyes.

     If your eyes are exposed to large amounts of UV radiation over a short period of time, you may

experience a kind of sunburn of the eye, which is harmful. Your eyes will become red and feel a strange

feeling. They may be sensitive to light. Fortunately, this is usually temporary (暂时的) and seldom causes

permanent damage to the eyes.

     Long-term exposure to UV radiation, however, can be more serious. Scientific studies and researches

have shown that exposure to small amounts of UV radiation over a period of many years increases the

chance of eye damage, which could lead to total blindness.

1. You would most likely find the article in

A. a doctor's diary                

B. a travel journal

C. a medical magazine              

D. a physics textbook

2. Which of the following statements is TRUE according to the passage?

A. Too much eye exposure to UV rays may cause total blindness.

B. Short-time exposure of the eyes to UV rays doesn't harm them at all.

C. Most people know that UV rays harm the eyes as well as the skin.

D. The study was conducted by researchers from Japan, the USA and the UK.

3. The underlined word "sunscreen" in Paragraph 5 most probably means ______.

A. sunglasses      

B. sunhat        

C. suncream        

D. sunburn

4. What will the passage most probably talk about next?

A. Never ski on newly fallen snow in Japan.

B. Go to hospital to have your eyes examined.

C. Wearing a hat can provide protection while skiing in new snow areas.

D. Take some measures to protect your eyes while skiing in new snow areas.