植物激素和植物生长调节剂合称为植物生长物质。( )
参考答案：对
Some people would rather ride bikes as bike ridding has of the trouble of taking buses.
A．nothing
B．none
C．some
D．neither
甲烷化催化剂的设计装填量是（）m3。
A.10
B.12
C.20
D.6
