I would like you ________ a picture for me.[ ]
A. drawing
B. draw
C. to draw
D. drew
C
已知(2x+1)9=a0+a1x+a2x2+…+a9x9,则(a0+a2+a4+a6+a8)2-(a1+a3+a5+a7+a9)2的值为______.
干咳无痰,或痰少而黏,不易咳出,多为()。
A.痰湿阻肺
B.热邪犯肺
C.燥邪犯肺
D.饮停于肺
E.风寒束肺