下肢矫形器不包括()
A.踝足矫形器
B.膝踝足矫形器
C.膝关节矫形器
D.截瘫支具
E.髋膝踝足矫形器
参考答案:D
The Yangtze River, China’s longest, has been affected by a severe drought, _____ the lowest level of rainfall this year since 1961.
A.with
B.for
C.beyond
D.besides
开车时应先进冷物料后进热物料的原因是()
A.减小温差应力
B.减小局部过热问题
C.减小传热系数
D.A、B都选