A:细胞膜、内质网膜和核膜
B:线粒体膜、叶绿体膜和高尔基体膜
C:内质网膜、高尔基体膜和液泡膜
D:细胞膜、液泡膜和核膜
It's black and white.It has a short tail.It's a .
He is a much better (好得多) tennis player (运动员) than(比)me. When we play, he always wins(获胜)____________.
行驶的车辆突然刹车时如图所示,人向前倾的原因是( )