国家规定的天然气灶具的使用年限是()年
A.6
B.8
C.10
参考答案:B
To their great relief, the missing child returned home, ______, after an absence of two weeks.
A.looked tired and healthy
B.tired and healthy
C.tiredly and healthily
D.looking tired and healthily
调压屏伺服电机的制动时间取决于ZDJ的缓放时间。