300总吨及以上、500总吨以下的货船上至少应配备双向无线电话()台。
A.1
B.2
C.3
参考答案:B
Woman: Shouldn't someone go pick up the clothes from the laundry They were ready three hours ago.Man: Don't look at me, Mom.Question: What does the boy mean
A.He is unwilling to fetch the laundry.
B.He has already picked up the laundry.
C.He will go before the laundry is closed.
D.He thinks his mother should get the clothes back.
根管充填的时机除外()
A.髓腔已完全清理、扩大和成形
B.无自发痛、叩诊无反应
C.窦道口封闭、根尖区牙龈无红肿,无压痛
D.无腐败臭味、根管内无脓和血
E.根管内细菌培养阳性