标准麻花钻横刃较长,在钻孔时定心性好。
参考答案:错
增压柴油机机油压力的范围为()。
A、0.2—0.4Mpa
B、0.3—0.5Mpa
C、0.2—0.8Mpa
D、0.3—0.9Mpa
“How __ he ___ that?” all of them shouted
A.dare, said
B.dared, says
C.did, dared to say
D.did, dare to say