肺癌常见的症状，正确的是（） A.脓性痰 B.白色泡沫样痰 C.血痰 D.胸闷，气短

在电解质溶液的导电性装置（如下图所示） 中，若向某一电解质溶液中逐滴加入另一溶液，则灯泡由亮变暗至熄灭，后又逐渐变亮的是

A．盐酸中逐滴加入食盐溶液

B．硫酸中逐滴加入NaOH溶液

C．硫酸中逐滴加入Ba(OH)₂溶液

D．硫酸铜溶液中逐滴加入NaOH溶液

患者，男，75岁。大便艰涩，排出困难，小便清长，面色白，四肢不温，腹中冷痛，腰脊痰冷，舌淡苔白，脉沉迟。其治法是

A．清热润肠

B．顺气行滞

C．益气润肠

D．养血润燥

E．温阳通便

上颌窦癌用钴-60治疗，两野照射面积均为6Cm×6Cm，应为楔形板的角度为（）

A、15° 

B、30° 

C、45° 

D、60° 

E、75°

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     Over the last 25 years, British society has changed a great deal-or at least many parts of it have. 1_____.

Ideas about social class-whether a person is "working-class"or "middle-class"-are one area in which changes

have been extremely slow.

     In the past, the working-class terlded to be paid less than middle-class people. The typical working man

would collect his wages on Friday evening and then, as was widely believed, having given his wife her

"housekeeping",would go out and spend the rest on beer and betting.

     The old style of what a middle-class man did with his money was perhaps nearer the truth. He was likely

to take a longer-term view. Not only did he regard buying a house as a most important thing, but he also

considered the education of his children as extremely important. 2_____. Only in very few cases did workers

have the opportunity to make such long-ten plans. 

     3_____. In a large number of cases factory workers earn as much as their middle-class supervisors (管理

者). Social security and laws to improve job-security have made it less necessary than before to worry about

"tomorrow". Working-class people seem slowly to be losing the feeling of inferiority (自卑感). In fact there

has been a growing tendency in the past few yars for the middle-classes to feel slightly ashamed of their

position.

     4_____. They generally tend to share very similar tastes in music and clothes, they spend their money in

having a good time, and save for holidays or longer-term plans when necessary. There seems to be much less

difference than in previous generations. 5_____. As long as this gap exists, there will always be a possibility

that new conflicts will appear, or rather that the old conflicts will reappear, but between different groups.

A. Nowadays, a great deal has changed

B. Both of these provided him and his family with security

C. As a result, differences in life-styles and attitudes came into existence

D. However, we still have a wide gap between the well-paid and the low-paid

E. In recent years, the working-class people have begun to design long-tem plans

F. In some ways, however, very little has changed,particularly where attitudes are concerned

G. The changes in both lifehstyles and attitudes are probably most easily seen amongst younger people

旋涡泵是一种（）泵。

A.高扬程大流量

B.高扬程小流量

C.低扬程大流量

D.低扬程小流量