普通井通井时,通井规的下放速度应小于()。
A、0.5m/s
B、0.6m/s
C、0.7m/s
D、0.8m/s
参考答案:A
常用开放气道解除梗阻的方法有:头后仰—下颌上提法头;后仰—抬颈法;()。
. If plants from one habit were moved to the other type of habit, they changed their appearance and _____ the new environment.
A. adapted B adapted to C. suited to D. fit