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【单选题】
下列 酒类中，属于 葡萄 蒸馏酒的是 （ ）。A.
朗姆酒
B.
威士忌酒
C.
白兰地酒
D.
威士忌酒
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【简答题】ch6 证明:若关系R是BCNF关系模式,则R是3NF关系模式。
【单选题】— Who is ____ the TV show? She seems to be talented. — Mary Green, who used to be a great actress.
A.
opening
B.
hosting
C.
playing
D.
seeing
【单选题】Who are the kinds of reporters the writer seems to admire most?
A.
Reporters who are highly trained.
B.
Reporters who won't sully themselves.
C.
Reporters who are willing to sacrifice to chase after a story.
D.
Reporters who know how to sift through a lot of information.
【单选题】Who are the kinds of reporters the writer seems to admire most?
A.
Reporters who know how to sift through a lot of information.
B.
Reporters who are willing to sacrifice to chase after a story.
C.
Reporters who won't sully themselves.
D.
Reporters who are highly trained.
【单选题】有一溶液,遵守 Lambert-Beer 定律,在 280nm 处,当浓度为 c 时,测得吸光度为 A,当其浓度分别为下列几种情况时,透光率最大的浓度是
A.
0. 5 c
B.
1. 5 c
C.
3 c
D.
4. 5 c
【单选题】有一溶液,遵守 Lambert-Beer 定律,在 280nm 处,当浓度为 c 时,测得吸收度为 A, 当其浓度分别为下列几种情况时,透光率最大的浓度是( )。
A.
0.5c
B.
1.5c
C.
3c
D.
4.5c
【单选题】Lambert-Beer 定律适用于下列哪种情况( )
A.
白光、均匀、非散射、低浓度溶液
B.
单色光、非均匀、散射、低浓度溶液
C.
单色光、均匀、非散射、低浓度溶液
D.
单色光、均匀、非散射、高浓度溶液
【简答题】Mary is the kind of person who always seems to be ______ a hurry. A) on B) in C) with D) for
【简答题】There’s a man at the reception desk who seems very angry and I think he means____ trouble. A) B) to make C) to have made D) having make
【单选题】有一溶液,遵守 Lambert-Beer 定律,在 280nm 处,当浓度为 c 时,测得吸光度为 A,当其浓度分别为下列几种情况时,透光率最大的浓度是
A.
0.5C
B.
1.5C
C.
3C
D.
4.5C
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