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问题 单项选择题

膀胱肿瘤中最常见的为下列哪种

A．移行细胞癌

B．腺癌

C．鳞状细胞癌

D．横纹肌肉瘤

E．嗜铬细胞瘤

答案

参考答案：A

解析：[解题思路] 膀胱肿瘤中最常见的为移行细胞癌。

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（2）空应选择（）

A．can

B．must

C．will

D．shall
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单项选择题 案例分析题

患者为新生儿，其母为25岁初产妇足月分娩。患儿腹部膨隆，血压较正常略高，余无特殊。腹部B超提示右肾上腺区占位性病变。腹部MRI如图22所示。

下列检验结果中最可能出现的是（）

A.尿高香草酸（HVA.升高

B.血钙降低

C.尿游离儿茶酚胺升高

D.血皮质醇升高

E.血促肾上腺皮质激素（ACTH）升高

F.血磷升高
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