若有说明 int a[3][4]；，则a数组元素的非法引用是
A. a[0][2*1)
B. a[1][3]
C. a[4-2]
D. a[0][4)
According to the passage, modem advertising is "authoritative" because of the way it ______.
A. influences our image of the kind of person we ought to be like
B. interferes with the privacy of home life
C. continually forces us into buying things
D. distracts us no matter where we travel
Today there has been a change of attitude towards nature. This is shown in ______.
A. the pollution of rivers
B. the overfishing of seas
C. the increase in air pollution e
D. the fostering of forests
Why does the author mention the visible-light microscope in the first paragraph
A. To begin a discussion, of sixteenth-century discoveries.
B. To put the X-ray microscope in a historical perspective.
C. To show how limited its uses are.
D. To explain how it functioned.
微信支付 
支付宝支付