自由面数目的多少对爆破效果的好坏有（）影响。
A、很大的
B、很小
C、没有
参考答案：A
Write _____ and try not to make any mistakes.[ ]
A. as careful as possible
B. most careful
C. most carefully
D. as carefully as you can
喷嘴应保证喷射压力在（）kPa之间；每平方米带钢的喷淋量不低于l.6L／s。
A.10
B.40
C.60
D.10～30
