下面哪些分辨率属于16:9画面().
A.1280×720
B.1920×1080
C.720×480
D.1080×720
参考答案:A, B
Here some pictures of my family.
A.are
B.is
C.has
D.have
第一产程活跃期的减速期,是指宫口扩张
A.4~6cmB.6~7cmC.7~8cmD.7~9cmE.9~10cm