— 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.

You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

Prices may change quickly if supply or demand         .

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

—                      

2002年新配方口服补液盐(ORS)溶液的张力是

认定被告人有罪必须具备的条件是（  ）。