接地系统必须有足够的机械强度，而且还要考虑（）时的动、热稳定。 A.短路 B.开路

采用直接输血法输血100ml，需加3.8%枸橼酸钠溶液（）。

A.5ml

B.10ml

C.15ml

D.20ml

E.25ml

图是两种物质熔化时的温度一时间图象，其中____是非晶体的熔化曲线。另一种物质的熔点大约是____℃，在12分钟时，该物质处在_____状态。

年末，公司实现净利润600000元，按10%的比例提取法定盈余公积，按20%的比例提取任意盈余公积。经批准，以法定盈余公积20000元弥补以前年度累计亏损，以法定盈余公积40000元转增资本。编制提取法定盈余公积、任意盈余公积、弥补亏损和转赠资本的会计分录。

Thousands of villages in the developing world have no telephones. They have no money to build telephone systems. A new kind of technology may help change this situation. I t reduces the cost of building and using telephone systems.

Traditional systems use wires to carry electrical signals from one telephone to another. The wires often cost much more than telephones. The new system is based on radio communication. Each telephone sends and receives signals through the air, but not through the wires. This reduces the cost greatly. The radio telephone gets their power from the sun.

Each is connected to a solar equipment that changes the sun’s energy into electricity. A battery stores the electricity until someone needs to make or receive a call. The telephone turns off by itself if the level of power in the battery falls too low. This prevents damage to the system. Each radio telephone is connected to a computer microprocessor. It rewards how many calls are sent and received. It controls the power supply.

The technology needs more study, but its new use of radio equipment sun power and computers may help start telephone ringing in the other parts of the world.

68. The radio telephone gets their power from_____.

A. the sun 　　　B. electricity 　　　C. battery 　　　D. a special equipment

69. Each telephone is connected to_____.

A. a solar equipment 　　　　　　　B. a radio machine

C. a computer microprocessor 　　　D. Both A and C

70. From the passage we can infer that_____.

A. the new telephone system costs less than before

B. we can not use the radio as before

C. the new telephone system will take the place of the old one

D. it will be much easier to radio from now on

71. The main idea of the passage is_____.

A. a simple telephone system has been invented and costs less money

B. thousands of villages will use the new telephone system very soon

C. traditional telephone system will become useless

D. the new system will be too good to use

真寒假热证的病机是（）

A.阴盛格阳

B.阳盛格阴

C.阳虚则寒

D.阴盛则寒

E.阴损及阳