问题 单项选择题

精神外科的本意,即是通过外科手段改变人的不正常的精神活动和行为表现。1935年,葡萄牙精神病学家Moniz和神经外科医师Lima合作,施行双侧前额叶脑白质切除手术,从而开创了精神外科学。这种手术令病人冲动攻击行为明显减少,变得温顺,但也给部分患者遗留下不可逆的器质性精神障碍。1947年,脑立体定向技术应用于临床治疗并成功,这使得精神外科手术的精确性大为提高。在各个国家,都有一些医生试图采取切除、射频、冷冻等手段,去除人脑中不正常的意识。因为专家们认为精神外科是医学界的重要发展方向。 根据这段文字,对“精神外科”的理解不正确的是( )

A.精神外科是通过外科手术的技术改变人们的不正常的精神活动和行为表现

B.1935年首创的切除大脑白质的精神外科技术会不可避免地给患者留下不可医治的后遗症

C.1947年开始应用的脑立体定向技术大大提高了精神外科手术的精确性

D.随着科技进步和时代的发展,精神外科将会成为医学界的重要发展方向

答案

参考答案:B

解析: 第二段中“但也给部分患者遗留下不可逆的器质性精神障碍”说的是“部分”,而不是所有的,所以不能说“不可避免”。故选B。

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(10)空应选择()

A.fast

B.immediate

C.moment

D.last

填空题