找考题网-背景图
单项选择题

A.It is very well established.B.It is relatively new.C.……


Questions 11-13 are based on the following passage. You now have 15 seconds to read questions 11-13.
What do we learn about the use of solar energy in the USA



A.It is very well established.
B.It is relatively new.
C.It is found in one million homes.
D.It is being rapidly expanded.