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举一反三
【单选题】If the price of a normal good is measured along the vertical axis and its quantity along the horizontal axis, an increase in the price of the good will lead to:
A.
a downward movement along the demand curve.
B.
an upward movement along the demand curve.
C.
a rightward shift of the demand curve.
D.
a leftward shift of the demand curve.
【单选题】使用SELECT-SQL语句从student表中查询所有姓“王”的同学信息,正确的命令是________。
A.
Select * From student Where LEFT(姓名,2)= "王"
B.
Select * From student Where RIGHT (姓名,2)= "王"
C.
Select * From student Where TRIM(姓名,2)= "王"
D.
Select * From student Where STR (姓名,2)= "王"
【单选题】使用SQL语句从Student表中查询所有姓张的同学的信息,正确的命令是( )。
A.
SELECT * FROM Student WHERE LEFT（姓名，1）=‘张’
B.
SELECT * FROM Student WHERE RIGHT（姓名，1）=‘张’
C.
SELECT * FROM Student WHERE TRIM（姓名，1）=‘张’
D.
SELECT * FROM Student WHERE STR（姓名，1）=‘张’
【简答题】You need to make sure that its easy to find photos in the future. Along with adding titles, you can add______(3 words)that describe the photo.
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