静止锋雷暴常常是晚上增强,其原因是().
A.晚上冷气团活跃
B.晚上锋面移速成加快,冷空气对暖空气有较强冲击力
C.晚上层状云顶部迅速辐射冷却,大气变得不稳定
参考答案:C
Not until the train pulled into the station that his suitcase was gone.
A.had he found
B.did he find
C.he had found
D.he found
2007年3月16日,十届全国人大五次会议表决通过__________法、企业所得税法和其他法律文件。