下肢的折叠是怎样表现?
参考答案:表现在下肢时,如有进退,中间加以折叠,也就是欲进先退,欲退先进。
—Can you see the bridge ___over there?
— Yes. It’s scheduled to be completed next year.
A.built
B.to be built
C.being built
D.having built
人群平均需要量即为其RDA的是()
A.蛋白质
B.热能
C.脂肪
D.无机盐
E.维生素