2.已知向量和向量的夾角為，，則向量和向量的數(shù)量積　 ★　 .

[答案]3

[解析]。

1.若復(fù)數(shù)，其中是虛數(shù)單位，則復(fù)數(shù)的實部為★.

[答案]

[解析]略

請你根據(jù)下面提示起草一篇歡送Tom回國的短文。

湯姆三年前隨父母來到西安，在你班學(xué)習(xí)，在這段時間里，你們互相幫助，相處得很好。由于他的到來，許多同學(xué)對英語更感興趣，并在英語學(xué)習(xí)上取得很大進步�，F(xiàn)在湯姆就要隨父母回國了，你們準備為他舉行歡送會，請你代表全班起草一篇歡送他回國的短文，向湯姆告別，希望他回國后經(jīng)常給同學(xué)們寫信保持聯(lián)系，并希望他有機會再到中國來。

注意：字數(shù)(100左右)

(歡送詞的開頭已為你寫好)

Today we are having a party to honour our friend Tom, who is returning to his own country with his parents.

　 Dear Editor,

　 In order to keep my parents happy, I never went to　　　　　　　 61.__________

Internet bars, dancing halls or other crowding　　　　 　　　　　　62.____________

place. I like reading books or doing my homework　　　　　　　　 63.____________

at home while listening to music. But when during　　　　　　　　 64._____________　

every winter holiday, my home becomes a playroom.　　　　　　 　65._____________

Many relatives gather here play cards. I am　　　　　　　　　　　 66._____________

very tired of the noise the game makes, so my　　　　　　　　　　 67._____________

parents enjoy it. How I hope at a quiet place to　　　　　　　　　　 68._____________

read books or learn something that they cannot get　　　　　　　　 69______________

at school without disturbed！Please help me!　　　　　　　　　　 70._____________

　　　　　　　　　　　　　 Yours,

　　　　　　　　　　　　　 Li Hua

60. The specialist didn’t make any ______ (評論) about your article.

59. ______ (有機) farming is becoming more and more popular now.

58. The smooth ______ (流通) of goods shows the normal development of economy.

57. It seemed as if the girl was ______ (迷惑) by her teachers question.

56. Our school has been developing very fast in last ______ (十年).

55. The postman ______ (投遞) our letters and newspapers for us every day.