[单项选择]托运精神和麻醉药品应提供（）卫生主管部门的运输证明。
A. 市（州）
B. 省（市）
C. 海关县（市）

[单选题]进行沥青或冷底子油作业时应通风良好，作业时及施工完毕后的24h内，其作业区周围（ ）m内禁止明火。
A.10
B.20
C.30
D.40

[单项选择]Music comes in many forms; most countries have a style of their own. (1) the turn of the last century when jazz was born, America had no prominent (2) of its own. No one knows exactly when jazz was (3) , or by whom. But it began to be (4) in the early 1900s Jazz is American’s contri- bution to (5) music. In contrast (6) classical music, which (7) formal Euro- pean traditions, jazz is spontaneous and flee-form. It bubbles with (8) , expressing the moods, interests, and emotions of the people. In the 1920s jazz sounded like American, and (9) it does today. The origins of this music are as (10) as the music itself. American Negroes, or blacks, as they are called today, were the jazz (11) . They were brought to Southern States (12) slaves. They were sold to plantation owners and (13) to work long hours. When a Negro died his friend and relatives (
A. energy
B. humour
C. water
D. light