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【简答题】
食品加工用水最常用的水源是 ,该水源监测应每年 次。
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举一反三
【单选题】下列关于有机物分析的说法中，正确的是 [     ]
A.
某有机物在过量氧气中充分燃烧，只生成CO 2 和H 2 O，由此可知该有机物中一定只含有碳氢两种元素
B.
质谱法可以分析出某有机物的相对分子质量，从而可推断出该有机物的结构简式
C.
不同化学键或官能团对红外光的吸收频率不同，故可以利用红外光谱图来分析有机物含有的化学键和官能团
D.
二甲醚（CH 3 -O-CH 3 ）中含有两个甲基，故它的核磁共振氢谱图中有两个吸收峰
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【简答题】Chris: Hi, Dave. Where (1)______ you yesterday? You (2)______ come to English.Brandon: I (3)______ at home. I (4)______ all day for my final in Biology. What (5)______ you do in class?Chris: We (6)___...
查看完整题目与答案
【简答题】A．She is not sure Tom is joking. B．She thinks Tom wants to go into business. C．She thinks Tom may sell his shop. D．She thinks Tom has already studied in university.
查看完整题目与答案
【单选题】水作为溶媒下列哪一项叙述是错误的 [ ]
A.
经济易得
B.
溶解范围广
C.
易于霉变
D.
杂质提取少
查看完整题目与答案
【单选题】水作为溶媒下列哪一项叙述是错误的( )
A.
经济易得
B.
溶解范围广
C.
易于霉变
D.
易于纯化
E.
能引起有效成分的分解
查看完整题目与答案
【单选题】由于酿酒所用的原料不同,因而酿制的酒也各不相同,按酒的 ( ),大体可分为白酒、黄酒、啤酒、果酒、汽酒、配制酒六大类。
A.
香型
B.
特点
C.
口味
D.
原料
查看完整题目与答案
【简答题】11. I read that ____ are very intelt. A. australian sheepdogs B. Australian sheepdogs C. Australian-sheepdogs
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【单选题】I told her this small story at great length. I do not know what she read into that letter, ... (Para.11)
A.
I told her this small and long story. I do not know whether she have read the story or not.
B.
I told her this small story in detail. I do not know whether she understood the meaning of the letter.
C.
I told her this small story in detail. I do not know whether she have read the story or not
查看完整题目与答案
【判断题】分子中不同的化学键或官能团对于红外光吸收频率不同,因此可以根据红外光谱上不同的吸收位置来判断分子中可能含有何种化学键或官能团的信息。
A.
正确
B.
错误
查看完整题目与答案
【简答题】A．She is not sure what's happened to Tom. B．She believes Tom is not coming. C．Tom has gone on a trip alone. D．She finds it difficult to put up with Tom's behavior.
查看完整题目与答案
相关题目：
【单选题】下列关于有机物分析的说法中，正确的是 [     ]
A.
某有机物在过量氧气中充分燃烧，只生成CO 2 和H 2 O，由此可知该有机物中一定只含有碳氢两种元素
B.
质谱法可以分析出某有机物的相对分子质量，从而可推断出该有机物的结构简式
C.
不同化学键或官能团对红外光的吸收频率不同，故可以利用红外光谱图来分析有机物含有的化学键和官能团
D.
二甲醚（CH 3 -O-CH 3 ）中含有两个甲基，故它的核磁共振氢谱图中有两个吸收峰
查看完整题目与答案
【简答题】Chris: Hi, Dave. Where (1)______ you yesterday? You (2)______ come to English.Brandon: I (3)______ at home. I (4)______ all day for my final in Biology. What (5)______ you do in class?Chris: We (6)___...
查看完整题目与答案
【简答题】A．She is not sure Tom is joking. B．She thinks Tom wants to go into business. C．She thinks Tom may sell his shop. D．She thinks Tom has already studied in university.
查看完整题目与答案
【单选题】水作为溶媒下列哪一项叙述是错误的 [ ]
A.
经济易得
B.
溶解范围广
C.
易于霉变
D.
杂质提取少
查看完整题目与答案
【单选题】水作为溶媒下列哪一项叙述是错误的( )
A.
经济易得
B.
溶解范围广
C.
易于霉变
D.
易于纯化
E.
能引起有效成分的分解
查看完整题目与答案
【单选题】由于酿酒所用的原料不同,因而酿制的酒也各不相同,按酒的 ( ),大体可分为白酒、黄酒、啤酒、果酒、汽酒、配制酒六大类。
A.
香型
B.
特点
C.
口味
D.
原料
查看完整题目与答案
【简答题】11. I read that ____ are very intelt. A. australian sheepdogs B. Australian sheepdogs C. Australian-sheepdogs
查看完整题目与答案
【单选题】I told her this small story at great length. I do not know what she read into that letter, ... (Para.11)
A.
I told her this small and long story. I do not know whether she have read the story or not.
B.
I told her this small story in detail. I do not know whether she understood the meaning of the letter.
C.
I told her this small story in detail. I do not know whether she have read the story or not
查看完整题目与答案
【判断题】分子中不同的化学键或官能团对于红外光吸收频率不同,因此可以根据红外光谱上不同的吸收位置来判断分子中可能含有何种化学键或官能团的信息。
A.
正确
B.
错误
查看完整题目与答案
【简答题】A．She is not sure what's happened to Tom. B．She believes Tom is not coming. C．Tom has gone on a trip alone. D．She finds it difficult to put up with Tom's behavior.
查看完整题目与答案
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