下列能表达肺泡与血液之间气体交换的是( ) A. B. C. D. 发布时间:2017-07-08 01:33 │ 来源:www.tikuol.com 题型:选择题 问题: 下列能表达肺泡与血液之间气体交换的是( )A.B.C.D.
题型:选择题 A ketch is a sailing vessel with().A.one mastB.two masts: with the mizzen stepped abaft the rudder postC.two masts: with the mizzen stepped forward of the rudder postD.two masts: a foremast and a mainmast 查看答案