可选性曲线有哪些用途？

缺词填空。

     Peter is a teacher in a middle school in Shanghai. He (1)t_______ English. He is (2)f_______ America. His

parents aren't in China. They (3)a_______ in America.

     Shanghai is very nice and Peter likes it very (4)m_______His school is very nice, (5)t_______. The other

teachers and the students are (6)a_______ very friendly. On Sundays Peter often (7)g_______ to the parks

with some Chinese friends. Peter can (8)s_______ much Chinese. He often (9)t_______ with Chinese people.

He is very (10)h_______ in China.

男性，22岁，北方人士。反复鼻血并渐进性鼻塞2年。

应首先考虑的原因是（）

A.鼻咽癌

B.鼻咽纤维血管瘤

C.鼻息肉

D.扁桃体炎症

E.鼻中隔歪曲并鼻甲肥大

在浆膜腔积液同一涂片中，作为测量其他细胞大小的“标尺”细胞是()

A．红细胞

B．白细胞

C．淋巴细胞

D．浆细胞

E．吞噬细胞

自2006年3月1日起，对于( )行业的营业税纳税人不用按照《营业税纳税人纳税申报办法》进行纳税申报。

A．娱乐业

B．文化体育业

C．建筑业

D．服务业

现行教育费附加的征收率为（）

A、1%

B、2%

C、3%

D、5%