用12个棱长是1cm的正方体木块摆成不同形状的长方体，它们的[ ]
A．表面积都是50cm2
B．体积都是12cm3
C．表面积和体积都不同
答案：B
1,2-乙二醇
A．(A) We’ll ask for more time to finish the financial plan.
B．(B) We’ll look for more information for the plan to be implemented.
C．(C) I’m afraid we’ll turn in the financial plan later than expected.
D．(D) We’ll have to finish the plan with the materials available now.
