复脉汤中用量最大的药物是（）
A.生地黄
B.炙甘草
C.大枣
D.阿胶
E.桂枝
参考答案：A
The robber was caught by two men ______ police uniform ______. [ ]
A. in; at the once
B. in; at once
C. on; at the once
D. on; at once
测距机系统是通过什么方式测量距离的：（）.
A.询问-应答
B.询问
C.应答
D.寻址
