万用表是多用途仪表，在使用时应首先确认被测量的（）和（）。
参考答案：性质；幅度
--Have you _ your debt?
---Yes, we worked day and night to _____.
A．paid off, pay for them
B．paid for, pay them
C．paid, pay for them
D．paid for, pay them off
中国在侵略战争中失败的原因有哪些？
