再生系统在系统开车前必须氮气置换合格。
参考答案:对
—I went to have the driving test this morning, but I didn't pass it.
—______[ ]
A. Luck decides everything.
B. Better luck next time.
C. But you can drive well.
D. You are always unlucky.
城乡居民养老保险待遇领取人员死亡的,从()起停止支付其养老金。
A.当月
B.次月
C.次年