以下哪种说法是错误的（） A.在甲基红试验中，呈现红色为阳性 B.甲基红试验阳性时，

阅读理解。

     Do you have a brother or a sister? Do you have two tennis rackets and a tennis ball? You can play tennis.

Two people or four people can play tennis. Do you have a basketball? 　　

     Do you have two brothers or sisters? Can your mother and father play? Five people can play basketball. 　　     Volleyball needs six people for each team and a volleyball. But baseball needs a big family. A baseball team

has nine people. You need a baseball bat and a ball.

1. _____ people can play baseball and they need a _____ and a _____ _____.

2. _____ or _____ people can play tennis.

3. Five people can play _____.

4. _____ needs six people for_____ team and a _____.

女性，39岁。平素健康，近期出现上腹不适，乏力，就医发现HBsAg（+），HBeAg（+），HBcAb（+）。

该患者如出现大量腹水，应采用下列哪种措施（）。

A.口服蛋白以加强营养

B.高盐饮食

C.自身腹水浓缩回输

D.输注红细胞

E.下地活动

张某，男，5岁，因枕部持续性疼痛，鼻后部流脓就诊。检查可见鼻咽顶部中央图形隆起，中线处可见一囊口，有脓液流出。首先应怀疑是（）。

A.咽囊炎

B.鼻咽癌

C.鼻咽纤维血管瘤

D.腺样体肥大

E.鼻咽部潴留囊肿

鸢尾的花结构很特殊，没有花萼和花瓣，通常具有三枚“垂瓣”和三枚“旗瓣”.

机泵正常运转时，换油周期应根据工作条件而定，一般应在3～6个月内更换一次新油。