如图所示,倾角为的斜面体C置于水平面上,B置于斜面上,通过细绳跨过光滑的定滑轮与A相连接,连接B的一段细绳与斜面平行,A、B、C都处于静止状态,则( )A.B受到C的摩擦力一定不为零B.C受到水平面的摩擦力一定为零C.不论B、C间摩擦力大小、方向如何,水平面对C的摩擦力方向一定向左D.水平面对C的支持力与B、C的总重力大小相等
Children’s Day in Chinese is on . A. May 5thB. June 1stC. November 23th
Lucy has umbrella and I have uniform. A. a, an B. an, a C. an, an
This TV is . A. Lucy’s and Lily’s B. Lucy and LilyC. Lucy and Lily’s
A farmer ______. A. grows wheat B. interviews people C. sends letters
They aren’t picture books. Those storybooks are . A. mine, mine B. my, mine C. my, my