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【单选题】
下列关于蛋白质结构说法不正确的是( )。
A.
肽键可以自由旋转
B.
肽键是刚性平面结构
C.
在肽键上,C=O与N-H或两个Ca呈反式排布
D.
若破坏氢键,则α-螺旋构象便遭到破坏,而变成伸展的多肽链
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【单选题】Which of the following is correct for the underlined word in the sentence? I had some milk and bread for breakfast today.
A.
/bred/
B.
/bri:d/
C.
/bræd/
D.
/bre?d/
【单选题】Which of the following words can NOT be used to complete the sentence 'I cant reach it; its ______over my head. ' ?
A.
well
B.
right
C.
just
D.
extremely
【单选题】欣女士,28岁,已婚,未育,患单个较大宫体肌壁间肌瘤,经量>200ml,最恰当的处理是( )
A.
随访
B.
雄激素小剂量治疗
C.
经腹肌瘤剔除术
D.
子宫大部切除术
E.
子宫全切除术
【单选题】I felt unhappy because I failed the exam. Which part of the sentence is the underlined word?
A.
adverbial   
B.
predicative    
C.
object   
D.
predicate
【单选题】Which of the following sentence is NOT an elliptical sentence(省略句)?
A.
I want to improve my French but I don't know how.
B.
Some of the answers were correct while I don't know which.
C.
This is what I want to say and I hope that you can follow me.
D.
I touched the door to see if the dirt on it could be eliminated, and it surely could.
【判断题】在植物景观设计中,通常把牡丹和芍药种在一起,这样是为了能运用景观植物设计的互惠共生原则。
A.
正确
B.
错误
【单选题】Trade will reduce welfare when transport costs are sufficiently close to prohibitive and increase it when they are .sufficiently low.
A.
momentary
B.
forbidden
C.
strange
D.
tolerable
【单选题】Which of the following is closest in meaning with the sentence: 'I am feeling black'?
A.
I am sad.
B.
I am feeling well.
C.
I am dirty.
D.
I am very tired.
【单选题】In the sentence 'I have dressed up properly for this meeting, which was supposed to be my yearly appraisal' , the italicized word is a(n)______.
A.
derivative word
B.
compound word
C.
adverb
D.
noun
【单选题】Which of the following prepositions can NOT be used in the sentence 'I thought I would collapse_____lack of sleep.'?
A.
for
B.
by
C.
through
D.
in
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