颅内动脉瘤最常发生于椎动脉系统。()
参考答案：错
My neigh bours used to give me a hand in time of trouble, _______ was very kind of them.
A．who
B．which
C．that
D．it
08-32捣固车捣固装置四个内侧夹持油缸并联，油缸的大腔常通（）压力油液。
A、4.0Mpa
B、4.5Mpa
C、5.0Mpa
D、5.5Mpa
