泵按工作原理主要可分为(),()。
参考答案:容积式泵,叶片式泵
—What do you think of the 3-D printer?
—It’s great although it still needs further .
A.arrangement
B.education
C.information
D.development
肺淤血在平片上表现为()(1)肺门增大,血管边缘清楚(2)肺门增大,结构不清,血管边缘模糊(3)肺血管普遍扩张,边缘模糊,呈条纹状(4)肺内血管成比例增粗,边缘锐利(5)上肺静脉增粗,下肺静脉变细
A.(1)(2)(3)
B.(1)(3)(5)
C.(2)(4)(5)
D.(2)(3)(5)
E.(1)(3)(4)