在链条炉中,炉排前部的预热区、中部的燃烧区和尾部的燃尽区,所需的空气量()。
A.相同
B.预热区最大
C.燃烧区最大
D.尾部最大
参考答案:C
Jasmine was holidaying with her family in a wildlife park she was bitten on the leg by a lion. [ ]
A.when
B.while
C.since
D.once
茎圆柱形,具纵棱线,叶片为三回羽状深裂的药材为()
A.广藿香
B.薄荷
C.青蒿
D.益母草
E.槲寄生