All of our products are()first quality. A、forB、atC、ofD、with
All of our products are()first quality.
A、for
B、at
C、of
D、with
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3、3 装卸搬运与物流安全、质量无关。Loading, unloading and handling are irrelevant to logistics safety, quality.
带头结点的单链表first为空的判定条件是:A.first == NULL;B.first->link == NULL;C.first->link == first;D.first != NULL;