下列哪一项一般不用作为急性中毒时提供毒物鉴定的标本( )
A.呕吐物 B.胃液 C.剩余食物 D.尿与粪 E.脑脊液
参考答案:E
The course _______ for introducing multicultural America ranks first in the list of Popularity Courses among students this term.
A.is intended
B.intended
C.having intended
D.intending
29号元素的核外电子分布式为:()
A.A
B.B
C.C
D.D