The children land ___ the island. [ ]
A.at
B.in
C.out
D.on
答案:D
ZD6系列电动转辙机锁闭磁路的轴向窜动不大于0.8mm。()
补肝肾、强筋骨,又能安胎的药宜选
A.续断
B.狗脊
C.杜仲
D.骨碎补
E.A+C