80个5是（ ），7个400是（ ）；86里有（ ）十和（ ）个一。
400；2800；8;6；
Judging from her _______ look, I know it is a very _____ situation to her.
A．confused; confused
B．confusing; confusing
C．confusing; confused
D．confused; confusing
简述卧式注射机的优缺点？
