文档介绍：上海外国语大学苏河湾实验中学中考数学模拟试题
of rural drinking water sources, protection of drinking water sources in rural areas by 倒数 B．符号相同 C．绝对值相等 D．符号相反
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
10．某村办工厂今年前五个月生产某种产品的总量c(万件)与时间t(月)的函数图象如图4所示，那么该厂对这种产品来说( )
A．1月至3月每月生产总量逐月增加，4、5两月每月生产总量逐月减少;
B．1月至3月每月生产总量逐月增加，4、5两月生产总量与3月持平;
C．1月至3月每月生产总量逐月增加，4、5两月均停止生产;
D．1月至3月每月生产总量不变，4、5两月均停止生产.
11．如图5，在矩形ABCD中，DE⊥AC于E，设∠ADE＝a ，且cosa ＝，AB＝4，那么AD的长为( )
图4 图5 图
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
6
A．3 B． C． D．
12．一位美术老师在课堂上进行立体模型素描教学时，把14个棱长为1分米的正方体摆在课桌上成如图6形式，然后他把露出的外表都涂上不同的颜色，那么被他涂上颜色局部的面积为( )
A．33分米2 B．24分米2 C．21分米2 D．42分米2
13．：关于x的一元二次方程x2-(R＋r)x＋d2＝0无实数根，其中R、r分别是
⊙O1、⊙O2的半径，d为此两圆的圆心距，那么⊙O1，⊙O2的位置关系为( )