ZYJ7转辙机单向阀是通过钢球与配合端口密封，双单向通过油液。（）
参考答案：错
40 kilometers _____ Chengdu lies a town, _____ suffered great losses in the earthquake, but is now on the road to recovering.
A．west of; which
B．on the west in; where
C．west of; where
D．on the west of; which
渴不欲饮，常为何证的表现
A．饮食伤胃
B．胃阴亏耗
C．脾胃虚寒
D．瘀血停胃
E．湿热中阻
