小红和小丽一共剪了16朵纸花，送给小朋友7朵。还剩多少朵花？
16-7=9（朵）
They have no idea at all .[ ]
A. where he has gone
B. where did he go
C. which place has he gone
D. where has he gone
H2受体阻断剂适用治疗的疾病是( )
A．晕动病
B．变态反应性疾病
C．过敏性休克
D．支气管哮喘
E．消化性溃疡
