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【单选题】
Which statement is true regarding the effect of this command on the transaction in Scott’s session（）A.
The command fails as a transaction is still pending.
B.
The transaction in Scott’s session is rolled back and the tablespace becomes read-only.
C.
The command waits and the user SCOTT can execute data manipulation language （DML） statements only as part of the current transaction.
D.
The command hangsuntil all transactions on the objects in the tablespace commit or rollback， and then the tablespace is placed in read-only mode.
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【单选题】按逆时针方向听诊心脏顺序正确的是 (T：三尖瓣听诊区，M：二尖瓣听诊区，P：肺动脉瓣听诊区，A：主动脉瓣听诊区，E：主动脉瓣第二听诊区)
A.
T→M→P→A→E
B.
M→P→A→E→T
C.
T→P→M→A→E
D.
M→→T→E→P
E.
M→A→P→E→T
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D.
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A.
You don’t say
B.
I don’t agree
C.
Believe it or not
D.
I wouldn’t say that
【简答题】Do you know something about Lugouqiao I¬¬¬¬______( 事件 ) ?
【单选题】－Do you know that there are many different animals in the zoo? －Yes, I do. And I also know that some of them are scary.
A.
kinds of; kind of
B.
kinds of; kinds of
C.
kind of; kinds of
D.
kind of; kind of
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