《中华人民共和国消防法》中任何单位和个人都有责任维护消防设施，其中有哪些不准？

A frog (青蛙) is born in a small river．When he is young，the river is his home．He doesn’t know his parents，but he has hundreds of brothers and sisters．He swims about and plays with them all the time．At that time，he doesn’t look like his parents．He has no legs and he has a big tail (尾巴)．So he looks like a fish．

Later，his tail gets shorter and shorter．And he has four legs and a very short tail．He looks like his parents now. Then, he’s going to eat a lot of bad insects (害虫)．

小题1:Where is a frog born?

A．On a farm.

B．On the land.

C．In the river.

D．In the sea.小题2: Which of the following is right.'?

A．A baby frog stays at home and knows only his parents.

B．A baby frog looks like a bird and he knows his parents.

C．A baby frog looks like his parents but he doesn't know them.

D．A baby frog looks like a fish and he has a lot of brothers and sisters.小题3:Who does a frog play with all the time?

A．His parents.

B．His brothers and sisters.

C．Fish.

D．Insects.小题4:A frog has              .

A．four legs and a very short tail

B．four legs but he has a long tail

C．no legs but he has a long tail

D．no legs and he looks like a fish小题5:A baby frog              .

A．can't swim

B．can't eat bad insects

C．has no tail

D．can eat bad insects

收取的中央空调使用费（）营业收入不计征营业税。

一个物体做匀速直线运动，它在第8s内的速度是0.5m/s，则它在第4s内的速度是______，在4s内通过的路程是______，第4s内通过的路程是______．

发绀性先心病麻醉诱导用药不合适的是()

A．氯胺酮

B．硫喷妥钠

C．依托咪酯

D．氧化亚氮

E．咪达唑仑

细菌细胞壁共有的成分是

A．磷壁酸
B．肽聚糖
C．脂蛋白
D．脂质双层
E．脂多糖