多饮水，勤( ), 是预防尿路感染简单而有效的措施。

We shall ope n an L/C ____ you favor _____ Barclay's Bank here ___ the exte nt of 15000.

四肢骨折的典型临床表现是 ______、反常活动和骨擦音或骨擦感。

is, are, has, have, having The average British family, which ________ smaller and richer than 50 years ago, ________ 3. 6 members.

心理压力的表现形式是（）、（）和（）。

问题意识是对问题的一种______。

This car is very expensive. You have to pay half a million dollars ________ it.

John hardly speaks to anybody in the class, ________________?

________是西方医学的奠基人，被称为“医学之父”。

用二进制数表示的十进制编码，简称为____码。