A.
B.
C.
D.
[单选题]A.B.C.D.
[判断题]A.对B.错
[单选题]A.增加一倍B.增加二倍C.增加1/2倍D.[F]与A不成比例
[判断题]对错A.对B.错
[多选题]A.0B.1C.2D.3