动脉的管壁__________，__________大，管内血流的____________。
厚 弹性 速度快
Some small chemical plants in Industrial Park will be closed down within half a year according to a
decision _______ yesterday.[ ]
A. making
B. made
C. to be made
D. to make
CE标识不能缺少或缺误，CE标高度不能小于（）
A、3CM
B、3MM
C、5MM
D、5CM
