轴向力的正负规定是()
A、压为正
B、拉为正
C、指向截面为正
D、背离截面为负
参考答案:B
--- These dumplings are delicious.
---Yes. But I think the ones with beef are ___________ of all.
A.delicious
B.more delicious
C.the most delicious
D.the delicious
疾病的各种病理变化,均可概括为()
A.气血不和
B.邪正盛衰
C.阴阳失调
D.表里出入
E.上下升降