设1 1 1 1-|||-4 1 -3 7-|||-0 -2 0 5-|||-2 -3 7 9，1 1 1 1-|||-4 1 -3 7-|||-0 -2 0

[主观题]20/9，4/3，7/9，4/9，1/4，（）A、3/7；B、5/12；C、5/36；D、7/36

[单选题]1＋1,2＋3,3＋5,1＋7,2＋9,3＋11,1＋13，…第40项为( )A．1＋83 B.1＋81 C.1＋79 D.1＋77

8. 9-|||-7. 4. 1-|||-温 5 5 1 4. 7. 9.-|||-9 6 2 |1 |5 5 3 9-|||-|1 4 7 8 5 2-|||

[单选题]：1+1,2+3,3+5,1+7,2+9,3+11,1+13，…第40项为( )A．1+83 B.1+81 C.1+79 D.1+77

2 -5 1 2-|||--3 7 -1 4-|||-计算 D=-|||-5 -9 2 7-|||-4 -6 1 2

[单选题]2/3, 1／2, 2/5, 1／3, 9／7,( ).A．1／4B．1／6C．2／11D．2/9

(1)(2)(3)(4)(5)(6)(7)(8)(9)(1)(2)(3)(4)(5)(6)(7)(8)(9)

(1)(2)①②③④⑤⑥⑦⑧⑨⑩(3)(4)(5)①②③④⑤⑥⑦⑧⑨⑩(6)(7)①②③④⑤⑥⑦⑧⑨⑩(8)(9)①②③④⑤(1)(2)①②③④⑤⑥⑦⑧⑨⑩(3

计算：(1)/(3)×(3)/(5)+1(5)/(7)-(5)/(9)×(5)/(7)1-(5)/(7)×(21)/(25)(1)/(2)+(5)/(4)×(4