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【单选题】
固相微萃取技术是一种简便的预处理技术,其固相涂层有许多种,分析极性有机化合物时,一般选用()做固相涂层。
A.
聚二甲基硅氧烷
B.
聚丙烯酸酯
C.
活性炭
D.
石墨碳黑
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参考答案:
举一反三
【简答题】confusion creep curl deepen expose nightmare pulse somewhat throb utterThe long climb up the hill made my heart _________.
【多选题】下列各项中,影响资产负债表“存货”项目金额的有()。
A.
委托代销商品
B.
受托代销商品款
C.
受托代销商品
D.
委托加工物资
【简答题】The Burden of Thirst Millions of women carry water long distances. If they had a tap by their door, whole societies would be transformed. A Aylito Binayo’s feet know the mountain. Even at four in the...
【多选题】下列各项中,影响资产负债表“存货”项目金额的有()。
A.
委托代销商品
B.
受托代销商品款
C.
受托代销商品
D.
委托加工物资
【简答题】The long climb up the hill made my heart ________.
【简答题】Robots have come a long way since 15th century. We’ve got robots to build cars, carry heavy things, work in erous places and explore planets. But things haven’t stopped there. In 1986, Honda made ...
【单选题】— How many cars? — [     ]
A.
OK!
B.
Seven.
C.
Some.
【简答题】The long climb made us .
【判断题】历史上第一个使用“银行”二字的机构是英格兰银行。( )
A.
正确
B.
错误
【简答题】根据句子,写出划线词组的中文解释。 1. In those days,he used to give away a part of his income to help his friend. _______________ 2. Both sides argued with reason,and neither would give in. _______________ 3. If they ...
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