— Is it better to be physically attractive or intelligent?

   —                      . 

Sometimes buyers only purchase some        , tangible or intangible.

You can have eggs      or hard-boiled.

下列证据中既是传来证据也是间接证据的是（）

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         .

下列证据中既是书证又是物证的是（  ）。