问题 填空题

甲、乙两人玩猜数字游戏,先由甲心中任想一个数字,记为a,再由乙猜甲刚才所想数字,把乙所猜数字记为b,且a,b分别取0,1,2,3,若a,b满足|a-b|≤1,则称甲、乙两人“心有灵犀”,现任意找两个玩这个游戏,得出“心有灵犀”的概率为______.

答案

如下表所示:

0123
00|-1||-2||-3|
110|-1||-2|
2210|-1|
33210
一共有4×4=16种可能,“心有灵犀”的有10种,所以概率是
10
16
=
5
8

完形填空
Not only adults but also teenagers have problems in their life. Here is a survey showing the main problems of      .
They feel stressed because they have       homework to do both at school and at home. They have lots of exams      . And parents usually send them       different classes at weekends. As a result, so many of them almost become bookworms(书虫). On holidays, they could hardly have       time to do what they are interested in. Now more and more teenagers     short-sighted. They often read in bed or keep       for a long time without having a rest. Some of them are crazy about playing computer games. Some       too much watching TV.       serious problem among teenagers is that many of them are becoming fat. They eat too much junk food, but they take little exercise.
I think teenagers should think of ways on how to       the problem. They should make a plan for study and hobbies and find time to relax as much as possible.
小题1:
A.adultB.adultsC.teenagerD.teenagers
小题2:
A.too manyB.too muchC.much tooD.many too
小题3:
A.joinB.to be takenC.to takeD.to join
小题4:
A.toB.forC.ofD.in
小题5:
A.our ownB.their ownC.his ownD.they own
小题6:
A.are gettingB.are gettingC.gotD.are become
小题7:
A.redB.readC.to readD.reading
小题8:
A.payB.costC.spendD.take
小题9:
A.AnotherB.OtherC.OthersD.Some
小题10:
A.doing withB.do withC.dealing withD.deal with
问答题 简答题