白肋烟晾制后,当晾棚内的相对湿度为()左右时即可不架剥叶
A. 50%
B. 60%
C. 70%
D. 80%
气流下降式烤房的主要结构特点之一是()
A. 火管位于烤房地面
B. 火管位于烤房一面墙壁上
C. 火管在烤房顶部
D. 火管位于任意位置
About 20 of the passengers who were injured in a plane crash are said to be in_____condition .
A. decisive
B. urgent
C. vita
D. critical
The manager is calling on a______ customer trying to talk him into signing the contract .
A. prosperous
B. preliminary
C. pessimistic
D. prospective