在路口直行时,遇这种情形如何通行?()
A.让左方道路车辆先行
B.让右方道路车辆先行
C.直接加速直行通过
D.开启危险报警闪光灯通行
参考答案:B
—-I’m very sorry. I haven’t brought you the pen you lent me yesterday.
—-Forget it. You not return it to me as I have got an extra one.
A.must
B.need
C.can
D.should
分光光度法测定城市生活垃圾样品中全磷时,样品消煮过程应注意什么?