药物引起的与遗传异常有关的不良反应是（）

A.副作用

B.毒性反应

C.变态反应

D.后遗效应

E.特异质反应

Why have the Americans developed space shuttle according to the passage

Which of the following statements is NOT true according to the passage

A．The term "averted vision" refers to the act of looking out of the comers of one’s eyes.
B．If you want to see very faint things, you should better look sideways rather than straight on.
C．The receptors located in the eye’s center are less sensitive to dim light.
D．To "look" is to see something straight ahead.