肾动脉内的血液与肾静脉的相比,不正确的是肾动脉血液中 [ ]
A.各类代谢产物均多
B.尿素、尿酸多、二氧化碳少
C.养料多,氧气多
D.尿素、尿酸少、氧气少
AD
图是word所制作文档的一部分,其中剪贴画“青蛙”的文字环绕方式是()。
A.四周型环绕
B.浮于文字上方
C.紧密型环绕
D.衬于文字下方
— Sorry, Professor Smith. I didn't finish the assignment yesterday.
— Oh, you _____ have done it as yesterday was the deadline. [ ]
A. must
B. mustn't
C. should
D. shouldn't