在单件小批量生产或新产品试制中多采用（）法和（）法制定时间定额。

Passage One

Which of the following is true according to the passage

A．Clark Warren has been in the greatest difficulty imaginable.

B．Nearly all his friends had a painful experience of marriage.

C．His family members all enjoy a happy married life.

D．His parents died on their 70th wedding anniversary.