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问题 单项选择题 A型题

男性，52岁，颈前偏右有一实性结节，质硬。2周后出现声音嘶哑，超声显示：甲状腺右叶单发低回声结节，边界不清，内有细点状强回声；右颈部淋巴结肿大，最可能的诊断是（）。

A.甲状腺腺瘤

B.甲状腺恶性肿瘤

C.甲状腺囊肿

D.结节性甲状腺肿

E.桥本甲状腺炎

答案

参考答案：B

解析：该患者见边界不清的低回声结节，内见细小强回声。同侧颈部淋巴结肿大，病程发展快，故考虑为甲状腺癌。

单项选择题

It is clear that some chemicals can damage the health of animals and humans. (1) , this is not the only problem that (2) be caused by the careless use of chemicals. Chemicals can also (3) the ecological balance of the environment. If the ecological balance is disturbed, the results can be (4) serious.The (5) of DDT illustrates the problem. DDT, a chemical which kills insects, at first seemed to be a perfect answer (6) many problems. It would control insects that caused dangerous diseases, (7) insects that caused billions of dollars of damage to crops every year. Governments permitted and even (8) the use of DDT. Farmers in many countries (9) to spray it on their crops. The (10) results were good. Damage to crops (11) down, and profits went up. However, the chemical had effects which the scientists didn’t see in (12) . First, it also killed insects which were the (13) enemies of the harmful insects and which were therefore beneficial to farmers. Second, and perhaps worse, DDT did not kill (14) harmful insect. A few insects had natural resistance to the chemical. They (15) and reproduced in large numbers. In a few years there were large numbers of insects which were not (16) by DDT, and there were (17) insects which Could act as natural (18) on these new "super-insects". Finally, it became clear that DDT was not solving the insect problem. In fact, it was making the problem worse. It (19) became necessary to find a second (20) for the effects of the first.

第（6）空应选择（）

A．at

B．for

C．to

D．of
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多项选择题

建立健全现代文化市场体系，需要继续推进国有经营性文化单位转企改制，加快（）改造。

A、公司制

B、股份制

C、市场化

D、企业化
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