20世纪70年代以来，我国有黑热病发生的地区有（） A.甘肃 B.四川 C.新疆 D

Can animals do work for us? Some scientists think that animals may do a lot of jobs. They say that we may see many elephants, monkeys, dogs, bears, and other animals do a lot of things. Animals can get something to eat if（如果） they do some work for people.

Some scientists say that many different animals may do lots of jobs if they know they will get something to eat. Of course, dogs can guard（看护） a house , and elephants can do some heavy jobs. And we can also teach animals to work in factories. In America apes(猿)can help people make cars. Scientists believe that these big monkeys may drive cars.

小题1:Many different animals may do many jobs if______.

A．they can go to the wild(野外)

B．they learn they can get something to eat

C．they have a good place to live in

D．They are happy小题2:____can work for us.

A. Only a few animals    B Lots of animals   C. Few animals   D. No animals

小题3:What kind of animals can guard a house?

A．A dog

B．An elephant

C．An ape

D．A monkey小题4:what jobs can elephants do?

A．Doing heavy jobs

B．Guarding a house

C．Making cars

D．Driving cars小题5:Which of the following is true?

A．In China apes can help people make cars

B．All the animals can do work

C．Scientists believe that monkeys may play the piano

D．Apes may drive cars

点检员负责协助班长编制分管设备的大小修（）、材料需用计划。

硝酸甘油-β环糊精包合物

A．增加药物的溶解度
B．提高药物的稳定性
C．液体药物的粉末化
D．遮盖药物的不良嗅味
E．防止挥发性成份的挥发

用魏氏法测血沉，抗凝剂与血液的比例为

A．1:1
B．1:2
C．1:4
D．1:3
E．1:9

研究表明，3岁儿童已能辨别上下方位。