ABC干粉灭火剂主要是指()灭火剂。
A、磷酸铵盐
B、碳酸氢钠
C、氢氧化钠
D、磷酸氢钠
参考答案：A
怀疑肝、脾破裂的患者首选的检查是（）
A.B超检查
B.CT检查
C.淀粉酶检查
D.立位X线检查
E.MRI检查
We didn’t know his telephone number, otherwise we ________ him.
A．would have telephoned
B．must have telephoned
C．would telephone
D．had telephoned
