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【多选题】
下列关于带传动维护说法正确的是( )
A.
带传动要定期张紧
B.
带传动需要安装防护罩 了，避免V带接触酸、碱、油等腐蚀性物质，防止日光曝晒。
C.
带疲劳时候要整组更换，不可以新旧搭配混合使用。
D.
带的型号和轮槽的型号要一致，保证带和轮槽能够很好接触。
E.
安装时，两带轮的轴线要，两带轮的轮槽要对正，防止带扭曲。
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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
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【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】What does Lady Windermere's plan to live in a balloon indicate?
A.
Her subjective attitude toward fortune telling.
B.
Her desire to impress the Duchess.
C.
Her inability to separate reality from fantasy.
D.
Her respect for the accuracy of Mr. Podger's fortune-telling.
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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】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.
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【简答题】What's the matter with the lady? What is the lady doing? 4.What does she say on the phone?
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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
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无机酸
D.
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E.
挥发酸
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【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】What does Lady Windermere's plan to live in a balloon indicate?
A.
Her subjective attitude toward fortune telling.
B.
Her desire to impress the Duchess.
C.
Her inability to separate reality from fantasy.
D.
Her respect for the accuracy of Mr. Podger's fortune-telling.
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】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
【简答题】What's the matter with the lady? What is the lady doing? 4.What does she say on the phone?
查看完整题目与答案