【判断题】一般情况下,厂商得到的价格低于平均成本就停止营业
【判断题】UIWindow继承自UIView,是程序创建的第一个视图控件。如果没有UIWindow,程序就没有任何UI界面。
【单选题】Which of the following statements is NOT ture?
A.
a.Drugs are always given to animals for medical reasons
B.
b.Some of the additives in our food are added to the food itself and some are given to the living animals
C.
c.Researchers have known about the potential dangers of food additives for over thirty-five years.
D.
d.Food may cause forty percent of cancer in world.
【单选题】Which of the following statements is TRUE?
A.
. Marty got the muscle disease when he was born.
B.
. Marty looks different from others.
C.
. Most of Marty ’ s fellow students have accepted him at high school.
D.
. Marty wants the healthy children to feel sorry for him.