我国旅游投诉管理机构是县级以上(含县级)的旅游行政主管部门。 ( )
参考答案：对
Maria looks _____ these days because her daughter was hurt in a bicycle accident. [ ]
A. happy
B. worried
C. confident
D. unhealthy
16型钩舌钩锁坐入量原型为（）mm，钩锁坐入量不足45mm时修理恢复原型，不得在现车堆焊。
A.52±1.4
B.52±1.5
C.58±1.4
