原油加工方案根据原油性质和目的产物不同,可分为()、燃料-润滑油型和燃料-化工型三类。
参考答案:燃料型
If we go on using energy so wastefully, ______ are that our oil wells will be dried up ______ new
energy sources can be found to replace oil.[ ]
A. chances; before
B. difficulties; after
C. questions; since
D. problems; as
由于肾单位大量丢失,导致水钠潴留和细胞外容量增加而引起血压升高的是()。
A.原发性醛固酮增多症
B.皮质类固醇增多症
C.肾血管性高血压
D.肾实质性高血压
E.主动脉缩窄