哺乳动物能够依靠复杂的运动系统,快速移动适应复杂环境.有关运动系统说法错误的是( )
A:运动系统包括骨、关节和肌肉
B:关节面上有关节软骨能够缓冲震动
C:关节包括关节头、关节窝、关节腔
D:关节腔内的滑液能减少摩擦
完形填空。
This is a photo 1 a classroom. It's2 classroom. Look 3 the walls (墙). They4 white. You can see5old photo 6 the wall. What can you see7 the photo? This is 8 desk. 9 English book is on it. These are 10. They're on the desk too.
1932年,某政要指出:“世界近两年正在倒退,各国……采取危及世界和平的猜疑、恐惧和威胁的态度。”出现这一形势的主要原因是( )