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单选题The intensity of an earthquake depends on _____.A the movements of the earth's shellB where it takes placeC the injuries it causesD how far away it is from a city

题目
单选题
The intensity of an earthquake depends on _____.
A

the movements of the earth's shell

B

where it takes place

C

the injuries it causes

D

how far away it is from a city

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相似问题和答案

第1题：

－ Excuse me, how far is the airport from here? －().

A、You can take a taxi

B、It's about thirty miles

C、It's only six hundred dollars


参考答案：B

第2题：

－ Oh, but how long will it take to reach LA －()

A、It takes a long time to reach LA.

B、Usually it takes around 12 days.

C、LA is very far from here.


参考答案：B

第3题：

– Excuse me, how far is the airport from here? – ( ).

A、You can take a taxi

B、It's about thirty miles

C、I'll fly to Sidney

D、It's only six hundred dollars


正确答案:B

第4题：

“找出北京供应商的所有信息”的SELECT语句是

A．SELECT*FROM S WHERE CITY='京'

B．SELECT SNO，SNAME FROM S WHERE CITY='北京'

C．SELECT*FROM S WHERE CITY=北京

D．SELECT SNO，SNAME FROM S WHERE CITY=北京


正确答案：A
解析：“找出北京供应商的所有信息”的SELECT语句是SELECT*FROMSWHERECITY='北京'。

第5题：

The new appointment of our headmaster ________ from the very beginning of the next semester.

A、takes effect

B、takes place

C、takes turns

D、takes part


参考答案：A

第6题：

A: How long does it take from Beijng to London by plane? B:().

A、It costs 1,200 dollars

B、It takes about 7 hours

C、It's not near enough


参考答案：B

第7题：

It takes forty minutes to get from the airport to the city center by taxi.


参考答案：打的从机场到市中心要花40分钟。“take time to do sht.”表“花时间做某事”。  

第8题：

– How's the movie? Interesting? – ( ).

A、It was shown late until midnight

B、It was starred by a few famous people

C、Far from. I should have stayed home watching TV

D、I was seated far away in the corner


正确答案:C

第9题：

“找出北京供应商供应的所有零件信息”的SELECT语句是（ ）。 A．SELECT*FROM S WHERE CITY=’北京’ B．STLECT SNO,SNAME FROM S WHERE CITY=’北京’ C．SELECT P.*FROM S,P WHERE S.CITY=’北京’ AND S.SNO=SJP.SNO AND SJP.PNO=P.PNO D．SELECT P.*FROM P,S,SJP WHERE S.CITY=’北京’ AND S.SNO=SJP.SNO AND SJP.PNO=P.PNO


正确答案：D
北京供应商涉及到CITY属性，要用关系S,零件信息要用到关系P，而这两个关系需用关系SJP联系起来，所以FROM后面跟三个关系P，S，SJP。

第10题：

设有一个数据库，包括S、P、J、SJP四个关系模式如下：供应商关系模式S(SNO，SNAME, CITY)零件关系模式P(PNO, PNAME, COLOR, WEIGHT)工程项目关系模式J(JNO, JNAME, CITY)供应情况关系模式SJP(SNO, PNO, JNO, QTY)假定它们都已经有若干数据。则“找出北京供应商供应的所有零件信息”的SELECT语句是( )。

A．SELECT * FROM S WHERE CITY=′北京′

B．SELECT SNO, SNAME FROM S WHERE CITY=′北京′

C．SELECT P. * FROM S, P WHERE S. CITY=′北京′ANDS. SNO=SJP. SNO AND SJP. PNO=P. PNO

D．SELECT P.* FROM P，S, SJP WHERE S. CITY=′北京′AND S. SNO=SJP. SNO AND SJP. PNO=P. PNO


正确答案：D
解析：由于要找出零件信息，因此必然要用到表P，又因为是从北京供应商里查找，因此要用到表S，再加上两者之间的关系SJP，故SELECT后的FROM于句应为FROM P，S，JP。“北京供应商”的表达式是S.CITY='北京'，还要满足在3个表中的SNO和PNO属性对应相等，故WHERE语句为WHERE S.CITY='北京'AND S.SNO=SJP.SNO AND SJP.PNO=P.PNO．由此本题应该选D)。

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