SW-200K和AM96型转向架采用（）支重形式。
A.空气弹簧承重形式
B.心盘承重
C.摇枕圆簧承重形式
D.旁成承重
参考答案：A
.Most of the problems the government had been paying much attention to __ at last.
A．solve
B．being solved
C．were solved
D．are solved
