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【简答题】
获得相干光的方法有分波前法和分振幅法，杨氏双缝干涉属于( )，平行平板等倾干涉属于( )。
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举一反三
【单选题】关于筛分下列说法,错误的是( )
A.
筛分的目的是对粉碎后物料进行粉末分等
B.
筛分具有混合作用
C.
筛分时较粗的粉末先通过筛孔
D.
筛分后的粉末应适当加以搅拌，以保证药粉的均匀度
E.
筛分是借助网孔工具将粗细骨料进行分离的操作。
【简答题】青藤首先要经过日晒，在制作家具前还必须经过______，以防虫蛀。对色质及质量差的藤皮、藤芯，还可以进行______。
【简答题】溴乙烷是一种重要的有机化工原料，制备溴乙烷的原料有95%乙醇、80%硫酸（用蒸馏水稀释浓硫酸）、研细的溴化钠粉末和几粒碎瓷片，该反应的原理如下： NaBr+H 2 SO 4 →NaHSO 4 +HBr CH 3 CH 2 OH+HBr 硫酸 CH 3 CH 2 Br+H 2 O 某课外小组欲在实验室制备溴乙烷的装置如图．数据如表． 物质 数据 乙醇 溴乙烷 1，2-二溴乙烷 乙醚 浓硫酸 密度/g...
【单选题】关于筛分下列说法,错误的是( )
A.
筛分的目的是对粉碎后物料进行粉末分等
B.
筛分具有混合作用
C.
筛分时较粗的粉末先通过筛孔
D.
筛分后的粉末应适当加以搅拌，以保证药粉的均匀度
E.
筛分是借助网孔工具将粗细物料进行分离的操作。
【单选题】When a bargain purchase arises, IFRS 3 Business Combinations requires that the amounts involved in computing the bargain purchase should first be reassessed. When the amount of the bargain purchase ha...
A.
Charged as an expense in profit or loss.
B.
Capitalised and presented under non-current assets.
C.
Credited to profit or loss.
D.
Shown as a deduction from non-current assets.
【单选题】When bargain for a product, you should be confident but not _______. [ ]
A.
firm
B.
polite
C.
enthusiastic
D.
aggressive
【单选题】When a gain on a bargain purchase (negative goodwill) arises, IFRS 3 Business Combinations requires an entity to first of all review the measurement of the assets, liabilities and consideration transf...
A.
It is credited directly to retained earnings
B.
It is credited to profit or loss
C.
It is debited to profit or loss
D.
It is deducted from positive goodwill
【多选题】when you bargain with the shopkeeper, what will you say
A.
can you make it cheaper
B.
would you give me a discount
C.
can you come down a little
D.
I 'd like to have a pair of shoes
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