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【简答题】
运用供求分析说明：“谷贱伤农”的道理何在?为什么20世纪70年代石油输出国组织要限制石油产量?
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【简答题】Discuss the concept of Wasteland in relation to the works of those writers in the 20th century A-merican literature.
【单选题】有一蛋白质水解产物在 pH6 用阳离子交换柱层析时,第一个被洗脱下来的氨基酸是
A.
Val（ pI 为 5.96 ）
B.
Arg （ pI 为 10.76 ）
C.
Lys （ pI 为 9.74 ）
D.
Asp（ pI 为 2.77 ）
【单选题】The eldest son ______ all the family members to discuss how to celebrate the 50th wedding anniversary of their parents.
A.
clustered
B.
resembled
C.
assembled
D.
rendered
【单选题】有一蛋白质水解产物在pH = 6用阳离子交换柱层析时，第一个被洗脱下来的氨基酸是
A.
Val （pI为5.96）
B.
Lys （pI为9.74）
C.
Arg （pI为10.76）
D.
Asp （pI为2.77）
【单选题】有一蛋白质水解产物在pH6用阳离子交换剂层析时,第一个被洗脱下来的氨基酸是
A.
缬氨酸(pI5.96)
B.
精氨酸(pI10.76)
C.
赖氨酸(pI9.74)
D.
酪氨酸(pI5.66)
E.
天冬氨酸(pI2.77)
【单选题】Seminars are something like classes in which people discuss certain topics or subjects.
A.
Y
B.
N
C.
NG
【单选题】He______the meeting, but upon learning that they would discuss something irrelevant to his field of study, he dropped the idea.
A.
were going to attend
B.
had attended
C.
were to attend
D.
would have attended
【单选题】---Where is the manager? I have something important to discuss with him. --- He is at the airport now. He _________ for Beijing.
A.
has left
B.
leaves
C.
left
D.
is leaving
【单选题】有一蛋白质水解产物在pH 6用阳离子交换柱层析时，第一个被洗脱下来的氨基酸是：( )
A.
Val(pI为5.96)
B.
Lys(pI为9.74)
C.
Asp(pI为2.77)
D.
Arg(pI为10.76)
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