56厘米=（ ）米 89角=（ ）元 830千克=（ ）吨
5090克=（ ）千克 600平方厘米=（ ）平方分米
0.56；8.90；0.83；8.09；6
– Mike, did you see Mr. Chapman in the office just now?
-- Yes, he ______, and he looked a little bit nervous.
A．had been interviewed
B．interviewed
C．was being interviewed
D．was interviewed
能区别氯化镁、氯化铝、硫酸铵、硫酸钾的一种试剂是 [ ]
A．硝酸银
B．氯化钡
C．氢氧化钠
D．浓氨水
