【判断题】【消耗次数：1】
气相色谱法中液体手工取样器一般采用平头微量注射器。
①
正确
②
错误
参考答案：
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相关题目
【多选题】
气相色谱法鉴别，适宜的制剂样品为含有何种成分的制剂？
①
挥发油
②
挥发油成分
③
不挥发性成分可分解或制成挥发性衍生物
④
不挥发性成分不可分解
⑤
不挥发性成分不可分解或不能制成衍生物
【多选题】
顶空气相色谱法的特点有
①
样品处理方法简单
②
检测限低
③
可分析含量低的样品
④
适用于易挥发或易分解和无法直接进样分析的液体或固体样品的分析
⑤
可分析成分复杂的样品
随机题目
【单选题】
7.When we go abroad we are always being ______ around like a group of mentally disabled people.
①
guided
②
.ushered
③
introduced
④
displayed
【单选题】
9. All correspondence ______ to the editor should be sent by airmail.
①
addressed
②
sent
③
signaled
④
went
【单选题】
11.Since family ______children’s character, he encouraged parents to teach children reading.
①
formed
②
shaped
③
built
④
made
【单选题】
17. It was the headmaster _____ gave us the leave to go to the concert.
①
who
②
whom
③
that
④
which
【单选题】
15.It was on the day my first son was born _____ I put them in the soil.
①
when
②
who
③
that
④
where
【单选题】
19.Our school library is ________ closed for repairs.
①
shortly
②
quickly
③
temporarily
④
rapidly
【单选题】
24. They are teachers and dont realize ______ to start and run a company.
①
what it takes
②
what takes it
③
what they take
④
what takes them
【单选题】
21.If it ________ tomorrow, the match would be put off.
①
will rain
②
were to rain
③
was raining
④
had rained
【单选题】
4.The wedding ceremony is exactly ____ to coincide with his parents’ wedding anniversary.
①
timing
②
time
③
happening
④
timed