矫正臀位、横位的最佳时间是（）。
A.30周后
B.28周后
C.24周后
D.20周后
E.36周后
参考答案：A
He ________ me to come to my birthday party, but until it was over he didn’t appear at all.
A．asked
B．told
C．agreed
D．promised
机保车组在区间发生行车事故时应如何处理？
