多层装卸作业的注意事项：（）用叉车顶撞、拖拉货物。 A.可以 B.允许 C.不要 D

Felty综合征是指（）.

A.类风湿关节炎伴有脾大、中性粒细胞减少、贫血

B.血小板减少伴有溶血性贫血

C.溶血性贫血、血小板减少及急性肾衰竭

D.动静脉血栓形成、血小板减少、习惯性流产

E.过敏性哮喘、嗜酸性粒细胞增多、肉芽肿性血管炎

人群对鼠疫杆菌普遍易感。

阅读理解。

     Secondhand smoke isn't just a health threat to people. It can also hurt dogs and cats,veterinarians

say.

     According to the Centers for Disease Control and Prevention,more than 126 million Americans

who don't smoke are exposed to secondhand smoke in their homes,vehicles,workplaces,and public

places. This exposure causes thousands of lung cancer and heart disease deaths among nonsmokers

every year,according to the California Environmental Protection Agency.

     "Making the leap from the effects of secondhand smoke on humans to their effects on pets isn't a

big one," says veterinarian (兽医专家) Carolynn MacAllister of Oklahoma State University.

     "There have been a number of scientific papers recently that have reported the significant health

threat secondhand smoke poses to pets," MacAllister said. "Secondhand smoke has been associated

with oral cancer and lymphoma in cats,lung and nasal cancer in dogs,as well as lung cancer in birds."

     Studies have also shown that dogs living in a smoking household are susceptible to cancers of the

nose and sinus area,particularly if they are a long-nosed breed,because their noses have a greater

surface area that is exposed to carcinogens and a greater area for them to accumulate. Dogs affected

with nasal cancer normally don't survive for more than one year.

     "Short and medium-nosed dogs are more susceptible to lung cancer,because their shorter nasal

passage aren't as effective at accumulating the inhaled secondhand smoke carcinogens," MacAllister

said. "This results in more carcinogens (致癌物质) reaching the lungs."

     Birds are also at risk for lung cancer,as well as pneumonia,because their respiratory systems are

hypersensitive to any type of air pollutant.

     To help prevent animals from being adversely affected by smoking,pet owners who smoke should

have a designated smoking area that is separated from the home or stop smoking altogether,MacAllister

said.          

1. From the passage,we can see secondhand smoke maybe not harmful to _______.

A. smokers        

B. non-smokers    

C. pets        

D. trees

2. What can be suggested according to the passage?

A. Smokers can smoke anywhere.

B. Smokers can smoke at any time.

C. Smokers should smoke in the designated place.

D. Smokers must give up smoking at once.

3. What kind of dogs are likely to suffer from nasal cancer?

A. Long-nosed dogs              

B. Short-nosed dogs

C. Medium-nosed dogs            

D. Dogs without noses

4. The best title of the passage is __________.

A. Secondhand Smoke Causes Cancer in People

B. Secondhand Smoke Causes Cancer in Birds

C. Secondhand Smoke Causes Cancer in Pets

D. Secondhand Smoke Causes Cancer in Cats

5. What is the meaning of the underlined phrase "are susceptible to"?

A. are likely to be harmed by

B. are hard to be influenced by

C. are less to be effected by

D. are lucky to be caught by

.下列哪项属于副交感神经的作用

A．瞳孔散大

B．糖元分解增强

C．逼尿肌收缩

D．骨骼肌血管扩张

E．消化道括约肌收缩

传送速率单位“bps”代表的意义是 (3) ；
路由器是 (4) 层的设备；
IP地址共有5类，常用的有 (5) 类，其余留作其他用途；
虚拟网可以有多种划分方式，下列方式中不正确的是 (6) ；
100Base-T使用 (7) 作为传输介质。

A．物理
B．数据链路
C．网络
D．运输