A:《四月提纲》
B:对德和约
C:战时共产主义政策
D:新经济政策
实验需要木块进入不同的水平面有相同的初速度,则木块应从同一斜面____ 开始下滑.
He donated his money to poor people, so we realized that he had a heart __________ love.