施行心脏按压法时，按压频率应为每分钟60次左右。
参考答案：原题中：每分钟60次左右，应改为：每分钟100次。
Though she was young, she________her most time________the children in remote areas. [ ]
A. devotes; to teach
B. devoted; to teach
C. devoted; to teaching
D. is devoted; to teaching
Туристы _______ дорогу , по которой никто до них не ходил .
A．выбрали
B．набрали
C．собрали
