搜题请搜索小程序“爱下问搜题”
问题 选择题

与互为同分异构体的芳香族化合物最多有

A．3种

B．4种

C．5种

D．6种

答案

答案：C

题目分析：该有机物分子式为C7H8O，芳香族化合物中含有苯环，分为醇、酚、醚类，醇类有1种苯甲醇，酚类有3种邻间对甲苯酚，醚有1种苯甲醚，共5种，答案选C。

填空题

短文填空。

     Tom and Fred are t    l      about the year 2050.

     "What will the world be like in the year 2050?" asks Tom.

     "I don't know,"says Fred.  "What do you t   2    ?"

     "Well, no one knows. But it is interesting to guess," says Tom.  "In the year 2050 everyone will

c   3   a pocket computer. If we have problems, the computers will give us a   4     . And we can talk to

our friends all over the world. P 5      we will work only two or three days a week. We can f   6    to

the moon by spaceship and spend v   7    there. "

     "I'm very glad to h   8    that. I h  9    to fly to the moon, and I also hope to   10    in the sea," says

Fred. "Won't that be very interesting? Just like a fish. "
查看答案
单项选择题

判断肢端肥大症的病情活动性最敏感、最可靠的指标是（）。

A.碱性磷酸酶增高

B.IGF-1增高

C.血钙增高

D.血糖增高，糖耐量减退

E.胆固醇和（或）游离脂肪酸常增高
查看答案