可用于鉴别甲型溶血性链球菌和肺炎链球菌的指标是A．能否产酸产气 B．是否分解菊糖 C

In my village a lot of children have left school for many differentreason. Some families are so poor to send their children to school, so their kids have to earn money to support their families. There are also many parents do not think it useless to send their children to school. They prefer to have their children do something else rather than to let them go to school. I feel worried this. I think every children should have the opportunity to receive education. And it is necessary of us to care about the children, because one day they will play important part in the construction of our country. So ways must be found to prevent children from leave off their studies.

抢救甲状腺危象的首要措施是（）.

A.输液

B.静脉输注糖皮质激素

C.静注50%葡萄糖液

D.即刻补充TH

E.即刻给予PTU

He added three slices _______ chicken to it.   [ ]

A. from 

B. of 

C. for 

D. about 

在突起路标的抗冲击性能检测中，检测结果的合格性是以冲击点为圆心，半径为（）mm的圆形区域以外不得有任何形式的破损。

A、5

B、6

C、7

D、8