25. An air France jet is reported___ in the Atlantic Ocean with 228 people aboard, the airline's worst disaster in its 75-year history.

A. to have crashed　　　　　　　　　　　　　 B. to have been crashed

C. having crashed　　　　　　　　　　　　　 D. having been crashed

24. This was returned because the person ___ this letter was addressed had died three years ago.

A. to whom　　　　 B. to which　　　 C. which　　　　 D. whom

23. Sometimes advertisements make ____ possible for companies to sell the customers________money can not buy.

A. ;that　　　 B. it; what　　　 C. that; which　　　 D. it; whose

22. Jack wanted to be___ university student, but in____ entrance examination he missed by a mile.

A. a; a(n)　　　 B. the; the　　 C. the; a(n)　　　　　　 D. a; the

第一节语法和语汇知识(共15小题，每小题1分，满分15分)

　　 从A、B、C、D四个选项中，选出可以填入空白出处的最佳选项，并在答题卡上将该项涂黑。　

21. - Could you tell me the way to the railway station?

－＿＿＿＿

A. Sure　　　　 B. If you like　　 C. Make sure　　　　 D. Never mind

18．(1)BC (4分)

(2)两车相距最近时，两车的速度相同，设该速度为v，取乙车的速度方向为正方向．由动量守恒定律得 　m_乙v_乙-m_甲v_甲=(m_甲+m_乙)v　　　　　 (2分)

所以两车最近时，乙车的速度为

v= m/s=m/s　　　 (2分)

(共8分)

17．画出如图光路图，设折射角为r，根据折射定律　解得

由几何知识得，ΔOPQ为直角三角形，所以两个光斑PQ之间的距离

解得　 　　　

(每空2分，共8分)

16．油层长度　　　 ………………………………2分

油层厚度………………………… 　3分

　 (2)(倍)　　　　 ………………………… 　3分