烧杯加热时用石棉网的目的是请选择ABCD(j9W*f(B0l)g7m-v/i5c'm(U'a,V,D9g5V([0s8s1M4K7~
A.加快反应5c'm(U'a,V,D9g5V([0s8s1M4K7~
B.在铁圈上易托平仪器5c'm(U'a,V,D9g5V([0s8s1M4K7~
C.减慢反应5c'm(U'a,V,D9g5V([0s8s1M4K7~
D.使烧杯受热均匀5c'm(U'a,V,D9g5V([0s8s1M4K7~