1. 关于闭合电路，下列说法中正确的是( )
A.闭合电路中，电流总是从电势高的地方流向电势低的地方
B.闭合电路中，电源的路端电压越大，电源的输出功率就越大
C.闭合电路中，电流越大，电源的路端电压就越大
D.闭合电路中，外电阻越大，电源的路端电压就越大
26. Autumn is ______ season in a year. It is called “fall” in American English. (09凉山州)
A. three B. the third C. a third
答案：B
25. Nowadays ______ of business letters are written in English. (09潍坊)
A. two third B. two thirds C. two three D. second three
24. ---Where does John live?
---He lives on ______ floor but he doesn’t use a lift to go up and down.(09朝阳)
A. nine B. the ninth C. ninth D. a ninth
23. We are going to hold a big party to celebrate _____ birthday of new China.(09株洲)
A. the sixtieth B. sixty C. sixtieth
答案：A
22. Father’s Day is on _______ Sunday of June. (09长沙)
A. three B. third C. the third
答案：C
21. On the first day of October 2009, our great country will have its ____ birthday. (09咸宁)
A. sixty B. sixties C. sixtieth D. the sixtieth
20. --- Which is the biggest number of the four?
---____________. (09咸宁)
A. Two-thirds B. A half C. A quarter D. One-third
19. The important sports festival, the Olympic Games, _____ held every _____ years.(09咸宁)
A. is, five B. are, three C. is, four D. are, two