无症状性心肌缺血的诊断最主要的依据是（）
A.既往病史
B.血清酶学检查
C.心电图检查
D.临床表现
E.X线检查
参考答案：C
The young lady eats ______ meat, so she's ______ fat. [ ]
A．much too, too much
B．too much, much too
C．too much, too much
D．much too, much too
制动主缸又称制动（）。
A.轮缸
B.总泵
C.分泵
D.比例阀
