一用户的总账与明细账对账不平,无法结账,怎么办?
参考答案:
请检查code表中该科目的非末级科目是否打上了末级标志(bend值是否为真),只用末级科目该字段值才为真。
We ________ here on time but we were caught in a traffic jam.
A.must have arrived
B.could have arrived
C.need have arrived
D.should have arrived
光化学烟雾是对人类和自然界生物极有害的物质,它主要是由汽车排放的()在强烈阳光的紫外线照射下形成的。
A.NOx和CO
B.NOx和HC
C.SO2和碳烟
D.CO2和HC