试题与答案

如图所示,质量m=1kg的小球用细线拴住,线长l=0.5m,细线所受的拉力达到F

题型:计算题

题目:

如图所示,质量m=1kg的小球用细线拴住,线长l=0.5m,细线所受的拉力达到F=18N时就会被拉断;当小球从图示位置释放后摆到悬点的正下方时,细线恰好被拉断;若此时小球距水平面的高度h=5m,重力加速度g取10m/s2,求小球落地处与细线恰被拉断时的位置间的距离?

答案:

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参考答案:A解析:根据民事法律行为的成立取决于一方还是双方的意思表示可以将民事法律行为分为单方民事法律行为、双方民事法律行为。单方民事法律行为是指仅由一方当事人的意思表示就能成立的法律行为。典型的单...

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题型:阅读理解

阅读理解。

     It is Mike's birthday today.His mother buys a lot of food from the supermarket.Look at the table.There is a lot of

food on it.There are cakes,hamburgers,dumplings,meat,and fish.She buys a lot of drinks,too.There are coffee,coke,

apple juice,orange juice.There is tea,too.

     Mike asks some of his friends to his birthday party.They are Tom,Mary,Betty and Lily.All the children are eating

and drinking happily at the table.Lily is from China.She doesn't like coffee very much.She likes tea,coke and juice.All

the other children are all American.  They love coffee very  much.  They all enjoy the food.   After the dinner,  all the

children are singing and dancing.Lily sings a Chinese song.She sings very well.All the other children love her song

very much.The other children can't sing in Chinese,so they sing in English.All of them have a good time.

1.Why does Mike's mother buy so many things?

A.Because it is her birthday.

B.Because it is Mike's birthday.

C.Because Mike likes to eat them.

D.Because it is Mike's father's birthday.

2.How many children are there at the party?

A.There are five.

B.There are three.

C.There are four.

D.There are six.

3.Lily doesn't like        very much.

A.coke

B.coffee

C.orange

D.tea

4.Lily comes from        .

A.America

B.Japan

C.China

D.Canada

510.What do the children do after the dinner?

A.They see a film.

B.They watch TV.

C.They play football.

D.They sing and dance.

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