袋中有大小相同的三个白球和两个黑球,从中任取两个球,两球同色的概率为( ) A.1

题型:选择题

问题:

袋中有大小相同的三个白球和两个黑球,从中任取两个球,两球同色的概率为(  )
A.
1
5
B.
2
5
C.
3
5
D.
4
5
考点:随机事件及其概率
题型:选择题

比较两栖类和昆虫的生殖及发育方式,下列说法错误的是(  )

A.都是有性生殖

B.发育过程都从受精卵开始

C.都有变态发育

D.发育方式都是完全变态发育

题型:选择题

下列分散系不能发生丁达尔现象的是 (  )

A.豆浆

B.氢氧化铁胶体

C.硫酸铜溶液

D.烟、云、雾

题型:选择题

Long bus rides are like television shows .They have a beginning ,a Middle and an end –with commercials thrown in every three or four minutes .The commercials are unavoidable .They happen whether you want them or not .Every couple of minutes a billboard glides by outside the bus window . “buy super clean toothpaste”. “Drink Good’n Wet Root Beer .””Fill up with Pacific Gas .”Only if you sleep ,which site equal to turning the television set off ,are you spared the unending cry of “You Need It ! Buy It Now !” The beginning of the ride is comfortable and somewhat exciting ,Even if you’ve traveled that way before .usually some things have changed-new houses ,new buildings ,sometimes even a new road .The bus driver has a style of driving and it’s fun to try to figure it out the first hour or so . If the driver is particularly reckless or daring ,the ride can be an thrilling as a suspense story .Will the driver pass the truck in time Will the driver move into the right or the left –hand lane After a while,of course,the excitement dies down .sleeping for a while helps pass the middle hours of the ride .Food always makes bus rides more interesting .But you’ve got to be careful of what kind of foodyou eat .Too much salty food can make you very thirsty between stops. The end of the ride is somewhat like the beginning .You know it will soon be over and there’s a kind of expectation and excitement in that .The seat ,of course ,has become harder as the hours have passed.By now you’ve sat with you legs crossed ,with your hands crossed behind your head .the end comes just at the right time . There are just no more ways to sit.

The writer thinks that the end of the ride is somewhat like the beginning because both are ( )

A.exciting

B.comfortable

C.tiring

D.boring

题型:选择题

会计职业道德规范中的“坚持准则”,不仅指会计准则,而且包括会计法律、法规、国家统一的会计制度以及与会计工作相关的法律制度。()

A.正确

B.错误

题型:选择题

柔性石墨填料要比普通石墨填料的密度小。

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