电流电压联锁速断保护与过电流保护十分相似，只是取消了（）继电器。 A.电流 B.电压

二十世纪三十年代开始，日本、美国、大陆、台湾的学者相继对市镇展开了研究。八十年代以来，更有后起的中外学者，专门对市镇经济进行了区域性的宏观研究。根据所学知识，他们的研究结论不可能有[ ]

A．隋唐时期，城市里的固定交易场所是“市”

B．唐朝后期，广大农村有定期举行的“草市”

C．北宋时期，农村有些集市逐渐形成固定的市镇

D．明清时期，以工商业著称的市镇在全国范围蓬勃兴起

枣树的芽为复芽，同一节位上有（）个芽。

A、4

B、3

C、2

(A)

Around the world more people are taking part in dangerous sports and activities. Now, there are people who look for an immediate excitement from a risky activity which may only last a few minutes or even seconds.

I would consider bungee jumping (蹦极) to be a good example of such an activity. You jump from a high place 200 meters above the ground with an elastic (弹性的) rope tied to your feet. You fall at up to 150 kilometers an hour until the rope stops you from hitting the ground. It is said that about 2 million people around the world have now tried bungee jumping. Other activities which most people would say are as risky as bungee jumping include jumping from tall buildings and diving into the sea from the top of high cliffs.

Why do people take part in such activities as these Some psychologists suggest that it is because life in modem societies has become safe and boring. Not very 10ng ago, people’s lives were constantly in danger. They had to go out and hunt for food, diseases could not easily be cured, and life was a continuous battle for survival.

Nowadays, according to many people, life offers little excitement. They live and work in quite safe conditions: they buy food in shops, and there are doctors and hospitals to look after them if they become ill. The answer for some of these people is to look for danger in activities such as bungee jumping.

The best title for the passage is（）。

A. Dangerous Sports: What and Why

B. Boredom of Modern Life

C. Bungee Jumping: Is It Really Dangerous

D. Need for Exercise

女性，45岁，间歇性发作咽下困难3个月，可因情绪波动诱发。食管造影未见异常。

如果食管黏膜活检示黏膜病变，环周有糜烂但无狭窄，该病变属于( )

A．Ⅰ级

B．Ⅱ级

C．Ⅲ级

D．Ⅳ级

E．Ⅴ级

石决明入煎剂宜

A．先煎
B．后下
C．研末冲服
D．包煎
E．同煎