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器不断进行开立方运算,随着开立方次数增加,结果越来越趋向( ) C.- 1 5.如图,若数轴上的点 A、 B、 C、 D,分别表示数- 1,0, 2,3,则表示 72- 的点应在线段 ( ) 0 1 2 3 4 512A B C D 第 5题图 A. AB之间 B. BC之间 C. CD之间 D. BD之间 三 .解答题 6.利用计算器求下列各式的值(结果保留 4个效数字) ( 1) (
图, △ ABC内接于 ⊙ O, ∠ OBC=25176。 ,则 ∠ A的度数为( ) ( A) 70176。 ( B) 65176。 ( C) 60176。 ( D) 50176。 第 3题图 第 4题图 圆内接三角形三个内角所
3时,分式的值为零; D.若 a≠ 13时,分式的值为零 13.当 x_______时,分式 15x的值为正;当 x______时,分式241x的值为负. 14.下列各式中,可能取值为零 的是( ) A. 22 11mm B. 2 11mm C.2 11mm D. 2 11mm 15.使分式| | 1xx无意义, x的取值是( ) A. 0 B. 1 C. 1
甲、丙两队合做 5天完成全部工 程的 ,厂家需支付甲、丙两队共 5500元 . ( 1)求甲、乙、丙个队单独完成全部工程各需多少天。 ( 2)若工期要求不超过 15天完成全部工程,问由哪队单独完成此项工程花钱最少。 请说明理由 . 1入夏以来,某地旱情严重,为缓解甲、乙两地旱情,某水库计划向甲、乙两地送水,甲地需水量为 180万立方米,乙地需水量为 120万立方米,现已两次送水:往地甲地送水
B. cool C. hot D. warm ☆ 14. Lucy looks ________when she performs. A. strongly B. beautifully C. wonderfully D. beautiful ☆ 15. Please put the food under the tree, it can keep the food ________and
a, 43 b ,则 a+b的值为 ______. 16. 用计算器探索 :已知按一定规律排列的一组数: 201,31,21,1 。 如果从中选取若干个数,使它们的和大于 3,那么至少需要选 ____个 . 17 .计算 | 922 |+ 22 的结果等于 _______ : 215 . 3 和 2 之间的所有整数为 ______________ 、思考下列计算过程 因为
can be C. have D. can have ( ) 20. A. the earliest B. the later C. the worst D. the best ( ) 21. A. with B. like C. without D. from ( ) 22. A. also B. too C. either D. as well ( ) 23. A. seasons B.
some trees from their flowers and fruit. Nonflowering plants do not grow flowers. You can not see many nonflowering plants around you. If you look carefully at the plants around you, you will find
s and thinks, an hour later she 9 it out. She is very tired, but very 10 . 1. A. good B. better C. fine D. well 2. A. at B. in C. on D. of 3. A. to make B. do C. to do D. to get 4. A. do B. to do C.
spoke to Mrs. Brown on the telephone. ( )35. Mrs Brown is looking for her son. B In England, it often snows in winter. When it snows, our garden looks very beautiful under the snow, and it is very