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【单选题】
离子分步沉淀时,沉淀先后顺序为 ( ) 。
A.
K sp Θ 小者先沉淀
B.
被沉淀离子浓度大者先沉淀
C.
溶解度小者先沉淀
D.
所需沉淀剂浓度最小者先沉淀
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【单选题】食品中的酸度,可分为( )(滴定酸度)、有效酸度(pH)和挥发酸。
A.
无机酸
B.
有机酸
C.
外表酸度
D.
总酸度
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【多选题】食品中的酸度,可分为( ) 和挥发酸。
A.
总酸度
B.
有机酸
C.
无机酸
D.
有效酸度
E.
挥发酸
查看完整题目与答案
【单选题】食品中的总酸度可分为( )(滴定酸度)、有效酸度(PH)和挥发酸度。
A.
总酸度
B.
游离酸度
C.
有机酸度
D.
无机酸度
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【单选题】食品中的酸度,可分为( )、滴定酸度 、有效酸度 (pH) 和挥发酸。
A.
不挥发酸
B.
有机酸
C.
无机酸
D.
总酸度
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【单选题】听力原文：W: If I buy some flowers for the house, will you water them for me while I'm way? M: Sure I will, if you'll water mine while I'm on vacation. Q: What will the man do for the woman? (8)
A.
Bring her some water.
B.
Buy her some flowers.
C.
Water her flowers while she is away.
D.
Water her flowers while she is on vacation.
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【单选题】—Jack, you water the flower today, ___? — But, dad, I watered it yesterday.
A.
do you
B.
will you
C.
didn’t you
D.
don’t you
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【单选题】What does the author say about Michelle Obama as a First Lady?
A.
However many fans she has, she should remain modest.
B.
She shouldn't disappoint the African-American community.
C.
However hard she tries, she can't expect to please everybody.
D.
She will give priority to African-American women's concerns.
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【单选题】What does the woman speaker tell us about the old lady?
A.
She went to the post office to draw her pension.
B.
She lost most of the pension.
C.
She lost a little.
D.
She was hurt by the man.
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【简答题】What working experience does the lady have?
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【单选题】听力原文：W: If I buy some plants for the house, will you water them for me while I'm away. M: Sure I will, if you’ll water mine while I'm on vacation. What will the man do for the woman?
A.
Bring her some water.
B.
Buy her some plants.
C.
Water her plants while she is away.
D.
Water her plants while he is on vacation.
查看完整题目与答案
相关题目：
【单选题】食品中的酸度,可分为( )(滴定酸度)、有效酸度(pH)和挥发酸。
A.
无机酸
B.
有机酸
C.
外表酸度
D.
总酸度
查看完整题目与答案
【多选题】食品中的酸度,可分为( ) 和挥发酸。
A.
总酸度
B.
有机酸
C.
无机酸
D.
有效酸度
E.
挥发酸
查看完整题目与答案
【单选题】食品中的总酸度可分为( )(滴定酸度)、有效酸度(PH)和挥发酸度。
A.
总酸度
B.
游离酸度
C.
有机酸度
D.
无机酸度
查看完整题目与答案
【单选题】食品中的酸度,可分为( )、滴定酸度 、有效酸度 (pH) 和挥发酸。
A.
不挥发酸
B.
有机酸
C.
无机酸
D.
总酸度
查看完整题目与答案
【单选题】听力原文：W: If I buy some flowers for the house, will you water them for me while I'm way? M: Sure I will, if you'll water mine while I'm on vacation. Q: What will the man do for the woman? (8)
A.
Bring her some water.
B.
Buy her some flowers.
C.
Water her flowers while she is away.
D.
Water her flowers while she is on vacation.
查看完整题目与答案
【单选题】—Jack, you water the flower today, ___? — But, dad, I watered it yesterday.
A.
do you
B.
will you
C.
didn’t you
D.
don’t you
查看完整题目与答案
【单选题】What does the author say about Michelle Obama as a First Lady?
A.
However many fans she has, she should remain modest.
B.
She shouldn't disappoint the African-American community.
C.
However hard she tries, she can't expect to please everybody.
D.
She will give priority to African-American women's concerns.
查看完整题目与答案
【单选题】What does the woman speaker tell us about the old lady?
A.
She went to the post office to draw her pension.
B.
She lost most of the pension.
C.
She lost a little.
D.
She was hurt by the man.
查看完整题目与答案
【简答题】What working experience does the lady have?
查看完整题目与答案
【单选题】听力原文：W: If I buy some plants for the house, will you water them for me while I'm away. M: Sure I will, if you’ll water mine while I'm on vacation. What will the man do for the woman?
A.
Bring her some water.
B.
Buy her some plants.
C.
Water her plants while she is away.
D.
Water her plants while he is on vacation.
查看完整题目与答案