与体循环相比,肺循环的特点为()
A.高压、高阻和高容
B.高压、高阻和低容
C.高压、低阻和低容
D.低压、低阻和低容
E.低压、低阻和高容
参考答案:E
Yao Ming is practicing hard in Houston himself for the coming new NBA season. [ ]
A. improving
B. improved
C. improve
D. to improve
下图是实验室制备、收集、验满、验证氧气性质的操作,其中正确的是( )