A:3+XY
B:3+X或3+Y
C:3或3+XY
D:3或3+XX
“一带一路”区域涵盖约44亿人口。这些人 ( )
如图所示,比赛中足球被踢出后在空中飞行时受到的力有( )
① —Who is she?
—She's my teacher,Miss Fang.
②—Who is she?
—She's my teacher,Mrs Wang.
③—Who is he?
—He's my teacher,Mr Zhang.
④—Who is he?
—He's my teacher,Mr Liu.
____
如图表示人血涂片在显微镜下的一个视野,下列相关叙述不正确的是( )
Although grandma is in her seventies, she is willing new things.