— Is it better to be physically attractive or intelligent?

   —                      . 

— Do you prefer a portable or a clumsy 3D printer?

—                      .

Sometimes buyers only purchase some        , tangible or intangible.

You can have eggs      or hard-boiled.

Goods are carried by several        of transport--on road or rail, by sea or air.

对象选择、功能分析、功能评价和方案创新与评价是价值工程的工作程序不可缺少的。

Every child is unique. Don’t        him or her to others.

— May I suggest the sales start on or about October 1?

—                      .

Prices may change quickly if supply or demand         .

— I wonder whether I could accept this discount or not.

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