从外界到达肺部的“旅程”顺序正确的是()
A:鼻→咽→喉→气管→支气管→肺
B:口腔→喉→咽→气管→支气管→肺
C:鼻→气管→咽→喉→支气管→肺
D:口腔→咽→喉→支气管→气管→肺
口号“外争国权,内惩国贼”“废除‘二十一条’”是在哪次运动中提出的( )
pencils, there, and, pictures, everywhere, are (.) (连词成句)
____
⑴____ A. shirt B. skirt C. ship
⑵____ A. chicken B. cheap C. lunch
⑶____ A. three B. math C. this
⑷____ A. these B. feather C. that
已知直线l1:x+y﹣3=0,l2:(1+3)x+(1﹣3)y+1=0,则直线l1与l2的夹角的大小是____