气缸磨损有一定的规律：沿轴线方向磨成上小下大的不规则的圆锥形；沿圆周方向磨成椭圆形。
参考答案：错
当人体处于安静或情绪稳定时，血液多归藏于
A．心
B．肝
C．脾
D．肺
E．肾
It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
A．other than
B．or rather
C．rather than
D．more than
