问题
选择题
Animals that couldn't themselves to the changed environment perished and those that could
survived. [ ]
A. change
B. adapt
C. adjusted
D. match
答案
答案：B
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Animals that couldn't themselves to the changed environment perished and those that could
survived. [ ]
A. change
B. adapt
C. adjusted
D. match
答案：B
如图所示，固定的锥形漏斗内壁是光滑的，内壁上有两个质量相等的小球A和B，在各自不同的水平面做匀速圆周运动，以下说法正确的是（ ）
| A．线速度vA > vB | |
| B．角速度ωA >ωB | |
| C．加速度aA ＝aB | D．压力NA> NB |