动脉导管未闭血流动力学的改变首先引起()
A.左心室增大
B.左心房增大
C.肺动脉扩张
D.右心室增大
E.右心房增大
参考答案:A
下列物质中,属于植物体内多糖的是[ ]
A.葡萄糖
B.淀粉
C.维生素D
D.纤维素
-Some people kill tigers and make medicine _____ their bones.
-Yes, it’s terrible, and we can’t wear clothes _________ animal fur.
A.from, made of
B.of, made of
C.into, make from
D.out, make of