CPI变频器P40代表（）参数，P50代表（）信号功能。
参考答案：电机类型；开通或关闭称重
If he had worked harder, he _________.
A．would succeed
B．had succeeded
C．should succeed
D．would have succeeded
对重症胰腺炎最具诊断价值的是（）
A.血脂肪酶增高
B.血淀粉酶增高
C.血钙降低
D.血胆红素增高
E.B超检查胰腺增大
