The watermelon is too big.
You can _____ it in half. [ ]
A. mix
B. cut
C. add
D. pour
答案:B
A.E=,m=0
B.E=,m=
C.E=,m=0
D.E=,m=
轨头下颚透锈长度超过()为重伤钢轨。
A.10mm
B.20mm
C.30mm
D.40mm