冲击试验机摆锤刀刃半径包括()
A.2mm
B.5mm
C.8mm
D.10mm
参考答案:A, C
Go _____ the park and _____ right. [ ]
A. to; to
B. on; turn
C. down; turn
D. to; turn
牛乳中脂肪含量一般为()
A.3.0-5.0%
B.3.0-3.5%
C.6-7%