海运险的基本险分平安险、（）和一切险三种。
A.卖方利益险
B.淡水雨淋险
C.水渍险
D.渗漏险
参考答案：C
— Poor Steve! I could hardly recognize him just now!
— ______, He has changed so much. [ ]
A. Never mind
B. No problem
C. Not at all
D. Me neither
线性规划的图解法通常适用于决策变量为（）的线性规划模型。
A.一个
B.两个
C.三个
D.四个
