当飞机起飞离地后，前轮定中是靠（）
A.转弯作动筒
B.定中凸轮
C.定中作动筒
D.利用风速定中
参考答案：B
简述财务会计报告的编制要求
— How is your English study?
— Not bad. But I learning English grammar.
A．am interested in
B．am good at
C．have a little trouble
D．have no trouble
