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【多选题】
在原子吸收分析中,如怀疑存在化学干扰,例如采取下列一些补救措施（）。A.
加入释放剂
B.
加入保护剂
C.
提高火焰温度
D.
改变光谱通带
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皮皮学刷刷变学霸
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A.
正确
B.
错误
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【单选题】They noticed fifty and twenty dollar bills __________ in the water.
A.
swimming
B.
swum
C.
floating
D.
floated
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【单选题】We read $ 20 as _____. [ ]
A.
twenty dollar
B.
twenty dollars
C.
dollar twenty
D.
dollars twenty
【单选题】听力原文：M: The skirt is ＄10.00 and the shirt is ＄6.00. W: Here's a twenty-dollar bill. How much change will the woman get?
A.
＄20.
B.
＄4.
C.
$10.00
D.
$6.00
【简答题】Look at the fuuny stoy and retell it using your own word in English. The Bill A man walked into a bar and says,“Excuse me ,I'd like a point of beer.” The barender serves the drink and says," That'll b...
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