皮皮学，免费搜题
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【单选题】
配位滴定法中测定水中 Ca 2+ 含量时,以 钙指示剂 为指示剂, 滴定终点时溶液的颜色由 色变为 色。
A.
黄-橙
B.
酒红-纯蓝
C.
无-浅粉
D.
黄-红
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皮皮学刷刷变学霸
举一反三
【单选题】We all agree that the products of this factory are of better ________.
A.
quality
B.
quantity
C.
principal
D.
identity
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【单选题】巴比妥类药物与碱共沸，水解释放出氨气，是由于
A.
分子结构中含有硫元素
B.
分子结构中含有丙烯基
C.
分子结构中含苯取代基
D.
分子结构中含有羰基
E.
分子结构中含有酰亚胺基团
查看完整题目与答案
【单选题】Only the factory ____ yesterday ____  this kind of machines.
A.
did we visit; does it produce
B.
did we visit; produces
C.
we visited; produces
D.
we visited; does it produce
查看完整题目与答案
【单选题】If there is a shortage of factory laborers, we would expect
A.
the wages of factory laborers to increase.
B.
the wages of factory laborers to decrease.
C.
the prices of factory commodities to decrease.
D.
a decrease in the demand for substitutes of what this factory produce.
查看完整题目与答案
【单选题】巴比妥类药物与银盐反应是由于结构中含有
A.
酰亚氨基
B.
酰肿基
C.
酚羟基
D.
芳香伯氨基
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【简答题】巴比妥类药物分子结构中含有丙二酰脲基团，其特性反应为
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【单选题】This is the factory ________ we visited last Monday.
A.
that
B.
where
C.
in which
D.
the one
查看完整题目与答案
【单选题】This is the factory ____ we worked a year ago.
A.
where
B.
that
C.
which
D.
on which
查看完整题目与答案
【单选题】鉴别巴比妥类药物的硝化反应，主要是利用该类药物结构中的
A.
不饱和碳氧双键
B.
不饱和碳氮双键
C.
互变异构中形成是羟基
D.
取代基中含有的双键
E.
取代基中含有的苯环
查看完整题目与答案
【单选题】The factory­­­­­­________ we visited yesterday was the one _______ I once worked.
A.
where; which
B.
which; which
C.
which; where
D.
where; where
查看完整题目与答案
相关题目：
【单选题】We all agree that the products of this factory are of better ________.
A.
quality
B.
quantity
C.
principal
D.
identity
查看完整题目与答案
【单选题】巴比妥类药物与碱共沸，水解释放出氨气，是由于
A.
分子结构中含有硫元素
B.
分子结构中含有丙烯基
C.
分子结构中含苯取代基
D.
分子结构中含有羰基
E.
分子结构中含有酰亚胺基团
查看完整题目与答案
【单选题】Only the factory ____ yesterday ____  this kind of machines.
A.
did we visit; does it produce
B.
did we visit; produces
C.
we visited; produces
D.
we visited; does it produce
查看完整题目与答案
【单选题】If there is a shortage of factory laborers, we would expect
A.
the wages of factory laborers to increase.
B.
the wages of factory laborers to decrease.
C.
the prices of factory commodities to decrease.
D.
a decrease in the demand for substitutes of what this factory produce.
查看完整题目与答案
【单选题】巴比妥类药物与银盐反应是由于结构中含有
A.
酰亚氨基
B.
酰肿基
C.
酚羟基
D.
芳香伯氨基
查看完整题目与答案
【简答题】巴比妥类药物分子结构中含有丙二酰脲基团，其特性反应为
查看完整题目与答案
【单选题】This is the factory ________ we visited last Monday.
A.
that
B.
where
C.
in which
D.
the one
查看完整题目与答案
【单选题】This is the factory ____ we worked a year ago.
A.
where
B.
that
C.
which
D.
on which
查看完整题目与答案
【单选题】鉴别巴比妥类药物的硝化反应，主要是利用该类药物结构中的
A.
不饱和碳氧双键
B.
不饱和碳氮双键
C.
互变异构中形成是羟基
D.
取代基中含有的双键
E.
取代基中含有的苯环
查看完整题目与答案
【单选题】The factory­­­­­­________ we visited yesterday was the one _______ I once worked.
A.
where; which
B.
which; which
C.
which; where
D.
where; where
查看完整题目与答案