【单选题】【消耗次数：1】
法定的农药残留测定的方法是
①
滴定分析法
②
MS法
③
GC法
④
HPLC法
⑤
UV分光光度法
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相关题目
【单选题】
紫外可见分光光度法中吸收系数法的原理是
①
比尔定律
②
被测组分与对照品吸收度相同
③
不同物质吸收系数不同
④
结构相似的组分相互不干扰
⑤
被测组分与杂质吸收系数不同
【单选题】
需采用紫外-可见分光光度法检查的项目为
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硫酸阿托品中莨菪碱的检查
②
地蒽酚中二羟基蒽醌的检查
③
阿司匹林中“炽灼残渣”检查
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阿司匹林中“重金属”检查
⑤
阿司匹林中“溶液的澄清度”检查
随机题目
【单选题】
We looked for a table to sit down, but they were all ____.
①
reserved for
②
engaged in
③
used up
④
taken up
【单选题】
It is ____ with the customer not to let the shop
assistants guess what she really likes and wants until
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in her honor
②
on her honor
③
a point of honor
④
an honor
【单选题】
But the Swiss discovered long years ago that
constant warfare brought them ____suffering and
poverty.
①
anything but
②
nothing but
③
none other than
④
no more than
【单选题】
Information and opinion gap exercises have to have
some content ___ talking about.
①
worthwhile
②
worthily
③
worth
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worthy
【单选题】
Jane tried to ____ the doorman with money, but she
failed.
①
bribe
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corrupt
③
award
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endow
【单选题】
He packed an ____ shirt in case he had to stay another day.
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spare
②
unnecessary
③
excessive
④
extra
【单选题】
I was awfully tired when I got home from work, but a
half hour nap ____ me.
①
revived
②
released
③
relieved
④
recovered
【单选题】
An institution that properly carries the name university is a more comprehensive and complex institution than any other kind of higher education ____.
①
settlement
②
establishment
③
construction
④
structure
【单选题】
Jane is in a hurry because the train to the airport leaves ______ half an hour.
①
by
②
in
③
for
④
until