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【单选题】
以下关于SQL语句及其用途的叙述,正确的是( )。A.
CREATE TABLE用于修改一个表的结构
B.
CREATE INDEX为字段或字段组创建视图
C.
DROP表示从数据库中删除表
D.
ALTER TABLE用于创建表
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【单选题】The money market is a dealer market where, over the telephone or through electronic systems, ______.
A.
a broker receives commission to act as an agent
B.
the investors are trading on a central trading floor
C.
firms buy and sell securities in their own accounts, at their own risk
D.
individual investors can trade on the exchange
【单选题】Attention, attention. This is your captain speaking. We have a miner flooding in the engine room. There is no immediate danger to crew, passengers or vessel, and there is no reason to be alarmed. For ...
A.
To go to assembly stations.
B.
To report to bridge.
C.
To remain at stations.
D.
To fight the flooding.
【单选题】___________of them like to sing the song “ Where is the time going?”.
A.
Each
B.
Everyone
C.
Every
D.
Both
【单选题】关于甲状腺功能亢进的叙述中，下列哪项是不正确的?
A.
继发甲亢是手术治疗适应证
B.
青少年患者禁忌手术治疗
C.
不准备手术治疗者，一律不应服用碘剂
D.
手术中结扎、切断甲状腺上极血管时应远离甲状腺上极
E.
甲状腺危象的发生多因术前准备不够所致
【单选题】关于甲状腺功能亢进的叙述，下列哪项是错误的
A.
继发甲亢是手术治疗适应证
B.
青少年患者禁忌手术治疗
C.
不准备手术治疗者，一律不应服用碘剂
D.
手术中结扎、切断甲状腺上极血管时应远离甲状腺上极
E.
甲状腺危象的发生多因术前准备不够所致
【单选题】Attention, attention. This is your captain speaking. We have a miner flooding in the engine room. There is no immediate danger to crew, passengers or vessel, and there is no reason to be alarmed. For ...
A.
To go to assembly stations.
B.
To report to bridge.
C.
To remain at stations.
D.
To fight the flooding.
【简答题】There is no risk to public health.
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