治疗痴呆髓海不足证，应首选（）。 A.七福饮 B.还少丹 C.转呆丹 D.知柏地黄丸

关于透平低速暖机不能时间太长的原因，下列说法正确的有（）。

A、长时间低速暖机会造成透平排气室温度急剧升高，使得转子受热不均，转子产生弹性弯曲

B、由于透平转子同轴瓦间是通过油膜将转子浮起的，低转速下油膜难以形成，会造成转子同轴瓦的干摩擦或过界摩擦，损坏转子和轴瓦

C、透平低速暖机不能时间过长主要是因为时间长会增加蒸汽的消耗，降低运行的经济性，但时间过长有助于机组的稳定

D、低速暖机会使得透平进汽喷咀的工作极不稳定，会使得接受蒸汽的叶轮产生部分受热、部分受力而部分不受力的情况，极易造成叶片及其附件的损坏

两条不相交的直线叫做平行线．[ ]

For many people today, reading is no longer relaxation. To keep up with their work they must read letters, reports, trade publications, interoffice communications: a never-ending flood of words. In getting a job or advancing in one, the ability to read and comprehend quickly can mean the difference between success and failure. Yet the unfortunate fact is that most of us are poor readers.

Most reading faults can be traced to early school training. According to Dr. Betts, two persons out of five in school were forced to read material too difficult for them to understand at the time, a frustration experience which left them with bad reading habits.

Fortunately, almost anyone can learn to read faster and with more comprehension. Age makes little difference. According to a recent study of 138 students at The Reading Laboratory, Inc. , all age groups showed a marked increase in reading rate after training from 93 percent for the 50-90 age group to 142 percent for the 20-29.Dr. Mila Banton Smith, director of New York University’s Reading Institute, says that the average adult student, in 28 training hours, nearly triples (三倍的) his reading speed and boosts(增长) his comprehension by about 30 percent.

The best way to improve your reading, of course, is to enroll(登记) in a reading clinic. If there’s no clinic handy, you can improve your reading ability yourself--- provided you have no eyes troubles. (if reading tires you easily or makes your eyes or head ache, you should consult a doctor.)

小题1:To many people today, _______.

A．reading quickly is easy

B．reading quickly and comprehending quickly can ensure their success

C．reading is only for fun

D．reading can ensure their success小题2:Most reading faults are_______

A．due to early school training

B．a frustrating experience

C．made by reading difficult materials

D．made by reading carelessly小题3:Who can learn to read fast and with comprehension?

A．teachers only

B．students only

C．a few people

D．almost everybody小题4:According to the passage, what is the best way to improve one’s reading？

A．go to a doctor

B．review what has been learnt at school

C．go to reading remedial class for special training

D．consult a dictionary

根据商品倾销的目的和时间不同，倾销可以分为：（）

A.偶然性倾销

B.掠夺性倾销

C.长期性倾销

D.隐蔽性倾销

（）同一开关电器直接控制二台及二台以上用电设备（含插座）。

A、严禁

B、必须

C、可以

D、三者均可