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【简答题】
阅读理解。 Jim is in a drawing class. The teacher is teaching the students how to draw mountains. Jim likes to draw, but he isn’t good at drawing mountains. So he looks at Wei Hua’s drawing. Her mountain is higher than David’s. Jim then looks at Lin Tao’s mountain. His is the highest of all. Jim thinks he doesn’t like high mountains, but he doesn’t know what to draw. He decides to look at some more drawings. Jim looks at Lucy’s mountain. Her mountain is small. Lily says, “Look at mine, Jim.” Lily’s mountain is smaller than Lucy’s. Jim wants to look at one more mountain. He looks at Liz’s. Hers is the smallest of all. Then Jim looks at the teacher’s mountain on the blackboard again. He starts to draw. At the end of the class the teacher has a look at their pictures and takes out three drawings. He says, “David’s drawing is good. Lily is better than David’s, but Jim’s is the best of all.” 1. What class is Jim having? A. A music class. B. A drawing class. C. A P.E. class. D. A geography class. 2. Whose mountain is the smallest? A. David’s. B. Lin Tao’s. C. Lily’s. D. Liz’s. 3. How many pictures does Jim look at before begins to draw his picture? A. Five. B. Six. C. Seven. D. Eight. 4. Which of the following is NOT true? A.Jim is good at drawing mountains. B. The teacher draws a picture on the blackboard. C. Jim doesn’t like high mountain. D. Lily’s picture is better than David’s. 5. What’s the best title of this article? A. How to Draw Mountains Well B. Jim’s Hobby C. Jim’s Art Class D. A Beautiful Mountain
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参考答案:
举一反三
【单选题】用于衡量柱效的参数
A.
峰高
B.
峰面积
C.
峰宽
D.
调整保留时间(t’R)
E.
峰位
【单选题】用于衡量柱效的参数
A.
峰高
B.
峰面积
C.
峰宽
D.
调整保留时间
E.
峰位
【简答题】简述甲醛吸收-副玫瑰苯胺分光光度法测定二氧化硫的原理,测定要点,注意事项。
【单选题】诗经是先秦作品吗?
A.
B.
不是
【单选题】甲醛吸收-副玫瑰苯胺分光光度法测定空气中二氧化硫时,测定波长为( )
A.
577nm
B.
545nm
C.
575nm
D.
330nm
【单选题】1,3—戊二烯经臭氧化,在锌存在下水解,可得到哪一种产物?
A.
HCHO + OHCCHO+CH2CHO
B.
HCHO + HOOCCH2COOH
C.
HCHO + CH3COCHO
D.
CH3COCHO + CO2 + H2O
【单选题】在XY平面上铣整圆应选择包含()地址符的圆弧插补指令
A.
R
B.
J,K
C.
I,J
D.
I,K
【单选题】甲醛吸收副玫瑰苯胺分光光度法测定二氧化硫时选择的测定波长为( )nm。
A.
420
B.
577
C.
560
D.
545
【单选题】在XY平面上铣整圆应选择包含( )地址符的圆弧插补指令。
A.
R
B.
I,J
C.
J,K
D.
I,K
【简答题】用于衡量柱效的参数
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