积冰部位的曲率半径(),积冰越强.
A.越大
B.越小
C.越冷
参考答案:B
What ______ Helen ______ last Monday? [ ]
A. did; did
B. did; does
C. do; did
D. did; do
总成本费用估算表中不包括()。
A.工资及福利费
B.利润
C.利息支出
D.折旧费