A B C D 1045～2634 0188～1384 4264～5735_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

A	B	C	D
1045～2634	0188～1384	4264～5735	6871～7267
5419～6753	2877～3901	7497～823 1	8301～9467

6023

答案

参考答案：A

选择题

—The maths problem isn't easy for Jack to work out, is it?

—______. He is far better at maths than we expected. [ ]

A. No, it isn't

B. I'm afraid not

C. I don't think it is

D. Yes, it is

单项选择题

可刺激肥大细胞释放组胺的成分是

A．C5a
B．C2b
C．C4b
D．C1s
E．C5b