绝对值小于π的整数是( )
0，±1，±2，±3
If you eat this kind of plant, you ____ very sick. [ ]
A. are
B. were
C. will be
D. have been
下列不属于物理性损伤的是（）
A.高温
B.低温
C.毒气
D.电流
E.激光
