人体实验的道德原则错误的是 A．符合实事求是的原则 B．符合患者健康高于医学目的的原

计算：-2×3²-（-3×2²）=（    ）。

桥梁承载结构的施工采用横向位移法多用在(。 )。

A．无通车线路的桥梁工程的换梁

B．正常通车线路上的桥梁工程的换梁

C．需高空作业的桥梁工程中

D．较大跨径的梁式桥梁上

阅读理解

     There are three branches of medicine. One is called "doctor medicine" or "scientific medicine".

Scientific doctors try to observe sickness,  look for logical pattern,  and then find out how the human

body works. From there they figure out what treatments may work. This kind of medicine is believed

to date from the 4th century BC. Although nowadays it is successful,  in the ancient this approach(方

法) probably did not cure many patients.

     The second kind of medicine is called "natural cures" or "folk medicine",  in which less educated

people try to cure sickness with various herbs(中草药). These folk healers also use observation and

logic,  but they are not so aware of it. They try things until they find something that seems to work,  

and then they keep doing that. Folk medicine flourished(兴起) long before the development of scientific

medicine and was more successful in ancient times.

     The third kind is called "health spas" or "faith healing". Sometimes this may be as simple as touching

the holy man and being immediately healed. Other times,  a magician may make you a magic charm,  

or say a spell(咒语),  to cure you. Some religious groups organize healing shrines(圣坛) for the sick.

In these places people rest,  get plenty of sleep,  eat healthy food,  drink water instead of wine,  and

exercise in various ways. They also talk to the priests(牧师) and pray to the gods. If you are feeling

depressed or you have been working too hard,  going to these places may be just the right thing to

make you feel better.

1. Doctor medicine_________.

A. has a longer history than folk medicine

B. has been practiced for around 2, 400 years

C. bases its treatments on observation and logic

D. was very successful in curing sicknesses in ancient times

2. According to the passage,  which of the following is NOT used in health spas?

A. Magic power            

B. Various herbs

C. Religious faith        

D. A healthy life style

3. According to the passage, which of the following statements is true?

A. Folk healers choose different herbs to cure diseases without any sound basis.

B. People who practice folk medicine need lots of formal education on herbs.

C.The success of folk medicine led to the development of doctor medicine.

D.Natural cures worked better than scientific medicine in ancient times.

4. The author's primary purpose in this passage is to_______________.

A. describe different types of medicine

B. argue for the importance of medicine in health care

C.show the important role religion plays in medical treatments

D.compare the educational background of three different types of patients

在Linux操作系统中，为一块设备名为eth1的网卡分配IP地址和子网掩码的命令是 (38) 。

A．ipaddress eth1 192.168.2.3 mask 255.255.255.0

B．config eth1 192.168.2.3 mask 255.255.255.0

C．serserial eth1 192.168.2.3 mask 255.255.255.0

D．ifconfig eth1 192.168.2.3 mask 255.255.255.0

如何在信息系统中查询国网的某个标准？