麻黄汤中麻黄、桂枝、甘草的剂量比例是()
A.1:1:1
B.1:2:1
C.3:2:1
D.2:2:1
E.3:3:2
参考答案:C
More TV programs,according to government officials, will be produced ________ people's concern
over food safety. [ ]
A. to raise
B. raising
C. to have raised
D. having raised
把系统输出的状态反向送到系统的()的叫做反馈。