质量为m的物体,由静止开始下落,由于阻力作用,下落的加速度为g,在物体下落h的过程中,下列说法中正确的是
Nancy is talking about the signs_______ her friends. A. with B. in C. about
He always______ a lot of questions. A. have B. has C. is
They're in different ________. A. class B. school C. schools
We shouldn't make noise here. It means “________”. A. Keep off the grass B. Keep quiet C. Don't touch
The sign means you shouldn't ______ photos here. A. take B. talk C. taking