新生儿便秘的原因有哪些？

阅读理解。

    John liked to wear his hair very long. Some of his friends thought that it looked like a girl's hair, but they

never made jokes about it, because John was a big, strong young man, and he didn't joke about his hair funny.

    John always went to the barber's twice a month to have his hair cut and washed, and one day the barber

said to him, "Now why don't you let me cut most of this hair off and make your head tidy? Nobody would

recognize you if I did that, I am sure."

    John said nothing for a few seconds, and then he said, "Perhaps you are right, but I'm sure that nobod

would recognize you either if you did that to my hair."

1. John kept long hair because _____. [ ]

A. John was a girl

B. the barber wouldn't like to cut it short

C. John liked it to be long

2. His friends never made jokes about the hair because _____. [ ]

A. the hair wasn't funny

B. John didn't like jokes about his hair and they were afraid of him

C. John was big and strong

3. A barber is a _____. [ ]

A. man who makes clothes for people

B. shop where one's hair can be washed and cut

C. person who cut man's hair

4. The barber advised John _____. [ ]

A. to have his hair cut short

B. to cut off most of his hair

C. to be cut off his long hair

5. John's answer was _____.[ ]

A. right

B. a great joke

C. a threatening (威胁) to the barber

引起支气管哮喘发作的因素有（）

A.交感神经兴奋

B.迷走神经兴奋

C.β受体兴奋

D.α受体兴奋

E.磷酸二酯酶作用增强

明桥面木结构作业的主要项目是桥枕护木。

某同学把他喜爱的书顺次编号1、2、3…，所有编号之和是100的倍数且小于1000，则他编号的最大数是多少

A．30

B．29

C．25

D．24

在考虑题中所给所有条件时，该银行体系的存款乘数为( )。

A．12.5

B．5.56

C．5

D．4.76