问题 单项选择题

有关尿毒症的叙述,哪项不正确。()

A.最早,最突出的症状是消化系统症状,主要原因是氨刺激胃黏膜

B.尿毒症性心包炎多为纤维素性心包炎,是由尿素刺激心包所致

C.常见的皮肤症状是瘙痒,与毒素对皮肤感觉神经末梢的刺激以及继发性甲旁亢引起的皮肤钙沉积有关

D.尿毒症患者可能有骨质疏松

E.尿毒症患者呼出的气体有烂苹果味

答案

参考答案:E

解析:

尿毒症患者呼出的气体有“烂苹果味”。患有慢性肾炎或肾病的患者,病程进展到慢性肾衰竭阶段(俗称尿毒症),由于无尿,某些毒性物质(如尿素氮、肌酐等)不能排出体外而潴留于血中,就会使患者呼出的气体散发出尿味或氨味,它是病情趋于危重的一个信号。

单项选择题

(三) Researchers have shown that noise can adversely affect human in both physiological and psychological ways. Hearing losses in particular occupations such as ship - building and con- structi - on work are well - known. In fact, however, we all find hearing more difficult as we age. Young ears can distinguish a wide range of sounds from low to very high frequencies, while older ears lose the ability to distinguish high -pitched sounds. A comparison of people living in some industrialized and non - industrialized areas suggests that this hearing loss may not necessarily accompany old age. Furthermore, a closer inspection of other data reveals economic effects. For instance, an increased turnover in property has been observed in noisy areas near airports. Job performance can be adversely affected by loud noise, especially if accuracy and mental effort are involved. The use of outdoor areas for conversation is not possible for an estimated 5 to 10 million people who live or work in urban areas. When interference with television or speech or sleep is included, as many as 22 to 24 million people can be said to have lost part of the use of their homes and grounds because of noise. Thus noise pollution is a serious environmental concern. The indifferent attitude toward noise should be overcome; considerable efforts should be made to alert people to the grave effects that may stem from an excessively noisy environment.

The last paragraph implies that______

A.people are generally concerned about noise pollution

B.many people haven’t yet realized the adverse effects of noise pollution

C.people are making efforts to overcome the noise problem

D.people are alert to excessively noisy environment

单项选择题