望神最主要的是观察（）
A.眼神变化
B.精神状态
C.面部表情
D.反应灵敏
E.语言气息
参考答案：A
缩回一块管片位置的千斤顶，使管片就位，立即伸出缩回的千斤顶，这样逐块拼装、最后成环的拼装方法。这种方法的（）必须纵向插入，最后封顶成环。
A、封顶块
B、通用块
C、相邻块
D、楔形块
—Does he know how to work out the problem?---Yes, he has ___ a good idea to solve it. ----Yes, he has ___ a good idea to solve it.
A．caught up with
B．kept up with
C．come up with
D．put up with
