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【单选题】
SQL语言中的CREATE TABLE语句实现（ ）。A.
数据查询
B.
数据操纵
C.
数据定义
D.
数据控制
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举一反三
【简答题】When it comes to decision-, one should make a quick choice without ________.
【单选题】The policeman ___ Mr.White is talking is a friend of mine.
A.
who
B.
whom
C.
with whom
D.
whose
【简答题】罗列出至少5种数据字典,并说明其作用?
【单选题】When should the authorities be contacted?
A.
After claiming one's baggage.
B.
When searching for lost luggage.
C.
When looking for a place to smoke.
D.
Upon seeing unattended luggage.
【简答题】Mr. White is talking with Wang Min. Listen to the conversation and decide whether the following statements are true (T) or false (F).
【单选题】对一定量的理想气体,下述几个准静态过程中不可能发生的是
A.
从外界吸收热量温度降低
B.
从外界吸热同时对外界做功
C.
吸收热量同时体积被压缩
D.
等温下的绝热膨胀
相关题目：
【单选题】The policeman ___ Mr.White is talking is a friend of mine.
A.
who
B.
whom
C.
with whom
D.
whose