造成黄土高原水土流失的主要人为原因有 ①植被的破坏②不合理的耕作制度③开矿④发展

题型:选择题

问题:

造成黄土高原水土流失的主要人为原因有

①植被的破坏②不合理的耕作制度③开矿④发展畜牧业[ ]

A.①②

B.①②④

C.①②③

D.②③④

考点:黄土高原
题型:选择题

短文填词:

Television has changed people’s life much since it was invented.

小题1:Now it has become one important part of m      life.People

enjoy themselves after hard work by watching TV. They can see

小题2:some plays, some stories and some sports    (比赛) without going

小题3:out of home, and without spending much money     (买) tickets.

TV programmes make people’s life more interesting. People learn

小题4:much       TV.

小题5:Students can s    by watching some educational programmes.

People can see news, weather reports, programmes about science

小题6:and computers. People all      the world can learn from each other

小题7:and get         (知识) when they are watching TV. But not

小题8:all the programmes are good        . Today, there are too many

programmers about love and crime .Some people become bad

小题9:because          those programmes. And watchingTV usually takes

小题10:too much time.         (此外), it’s not good for their eyes.

题型:选择题

--Why are you so depressed, Lily?

--- I lost the contest narrowly, or I _________ the award of $10,000.

A.had gained

B.would have gained

C.would gain

D.must have gained

题型:选择题

电梯中防止电梯超速和断绳的保护装置是( )。

A.限速器
B.安全钳
C.曳引轮
D.缓冲器

题型:选择题

在法学上,一般认为,划分法律部门的主要依据是法律调整的对象和方法。 ( )

题型:选择题

设供应商供应零件的关系模式为SP(Sno,Pno,Qty),其中Sno表示供应商号,Pno表示零件号,Qty表示零件数量。查询至少包含了供应商“168”所供应的全部零件的供应商号的 SQL语句如下:

SELECT Sno

FROMSP SPX

WHERE (37)

(SELECT*

FROM SP SPY

WHERE (38) ANDNOTEXISTS

(SELECT*

FROM SP SPZ

WHERE (39) ));

(39)处填()。

A.SPZ.Sno=SPY.Sno AND SPZ.Pno=SPY.Pno

B.SPZ.Sno=SPX.Sno AND SPZ.Pno=SPX.Pno

C.SPZ.Sno=SPX.Sno AND SPZ.Pno=SPY.Pno

D.SPY.Sno<>’168’ AND SPZ.Pno=SPY.Pno

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