突发公共卫生事件涵盖的范围包括（）。 A.新发传染病出现 B.灾后疾病的暴发流行 C

图中A点与B点的相对高度是（　　）

A．600米

B．100米

C．200米

D．400米

The number of  the workers in this factory     300, that is to say,

it       20%.

A．has increased by; has increased to

B．have increased to; have increased by

C．has increased to; has increased by

D．have increased by; have increased to

大白菜干烧心病是缺钾引起的。

细支气管不完全阻塞所致的阻塞性通气障碍可造成( )。

A．肺不张

B．肺纤维化

C．支气管扩张

D．气胸

E．肺气肿

内菌幕