证券交易所债券质押式回购交易中，以券融资方在初始交易前，必须将足够的资金存入其委托的证券经营机构的证券清算账户。( )
参考答案：错
The man pulled out a gold watch, ________ were made of small diamonds. [ ]
A. the hands of whom
B. whom the hands of
C. which the hands of
D. the hands of which
男，35岁。右上第一磨牙牙髓治疗后劈裂，拔牙过程中牙冠碎裂至龈下，牙根与周围骨质粘连。
此时拔除此根应先
A．牙挺取根
B．牙钳拔除
C．分根后拔除
D．翻瓣去骨拔除
E．涡轮钻拔除
