【简答题】(16分)(Ⅰ)下列实验操作或实验叙述正确的是( ) A.可用过滤的方法除去氢氧化铁胶体中少量的氯化铁 B.用酸式滴定管量取18.80mL的碳酸钠溶液 C.配制0.1mol/L的硫酸时,用量筒量取浓硫酸,要洗涤量筒,否则配制的溶液浓度偏低 D.振荡用饱和的碳酸钠溶液吸收乙酸乙酯的试管,发现有气泡冒出,它是CO 2 气体 E.实验室制取氨气时,常用无水氯化钙进行干燥 (Ⅱ)红矾钠(重铬酸钠:Na...
【单选题】Mary:__________________? Bill: The departure time is 11:30
A.
When is your arrival time?
B.
What’s your arrival time?
C.
When is your departure time?
D.
What’s your departure time?
【单选题】Mary:__________________? Bill: The departure time is 11:30
A.
when is your arrival time?
B.
what’s your arrival time?
C.
when is your departure time?
D.
what’s your departure time?
【单选题】汉译英:“原产地;有效期限”,正确的翻译为( )。
A.
place of issue Departure time
B.
place of origin Departure time
C.
place of issue Valid period
D.
place of origin Valid period