柏拉图要寻找的是（）。
A.花儿为什么这样红
B.现象世界的变化原理
C.现象世界背后的真理
参考答案：C
— How long have you been here?
— Only about five minutes. Henry and Simon _____ here with me. [ ]
A. have walked
B. had walked
C. walked
D. were walking
变形缝按其功能不同分为（）。
A、施工缝
B、伸缩缝
C、沉降缝
D、分隔缝
E、防震缝
