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问题 单项选择题

临床试验中的随机化是为了保证（）。

A.在试验期间对干预患者和对照患者的处理与评价相似

B.研究对象能代表该试验的目标人群

C.控制观察者间变异

D.干预患者和对照患者在人口学、临床及其它特征上相似

E.试验结果能在其它情况下重复得到

答案

参考答案：D

单项选择题 A1/A2型题

确诊膝关节滑膜结核时，以下哪项最可靠（）。

A.低热、盗汗、食欲差

B.膝关节肿胀、疼痛、功能受限

C.血沉增快

D.X线检查膝关节骨质疏松

E.滑膜病理检查
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单项选择题

One of the most convenient and cheapest ways to see America is by riding a Greyhound bus. This interstate bus system connects all major cities in the United States, (52) people with frequent and convenient service. The bus system even has an international service (53) makes connection with cities in Canada and Mexico.

Its network even extends to some of the smaller towns and out-of-the-way communities (54) the great interior of the country. Traveling by bus may (55) longer than flying by plane, but the terminals are located in the center of most cities and there is (56) to the downtown area. These buses are comfortable and air-conditioned. They are all equipped with toilets in the rear to (57) the convenience of the passengers, but there are some very severe (58) of conduct which are strictly enforced. On all buses (59) is forbidden and the consumption of alcoholic drinks is not allowed.

(60) bus travel may not be suited to everyone’s taste, it affords budget travelers the (61) to see America in comfort and safety and at a leisurely unhurried pace.

56().

A. easy access

B. fast way

C. short path

D. direct approach
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