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【单选题】
I can't afford that. I only have money.A.
a little
B.
a few
C.
/
D.
/
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【简答题】A.Because they want to retum to the job market． B.Because they want to leam something new． C.Because they want to make up for the education they missed． D.Because they want to prove themselves to be u...
【简答题】A.Because they want to travel to broaden their horizon. B.Because they want to explore what they are interested in. C.Because they need to go back to serve military duty. D.Because they need to recove...
【单选题】What do the airline companies want to do?
A.
They want to increase profits.
B.
They want to benefit the passengers.
C.
They want to sell cheap seats.
D.
They want to beat their competitors.
【单选题】蛋白质的三级结构是指
A.
蛋白质分子中所有原子的空间排布
B.
蛋白质分子中主链骨架原子的空间排布
C.
蛋白质分子中侧链原子的空间排布
D.
蛋白质分子中所有肽链的空间排布
【简答题】A．They want to give orders to the other. B．They want to know more than the other. C．They want to gain respect from the other. D．They want to get the other to behave properly.
【单选题】蛋白质的三级结构是指（）
A.
蛋白质的氨基酸顺序
B.
数条肽链之间相互作用形成的一个结构
C.
不同二级结构区域在空间上的折叠组合，即蛋白质的空间构象
D.
蛋白质的糖链修饰
E.
规则重复的折叠形式，通常包括α螺旋和β折叠
【单选题】Where do the mother and her son want to go?
A.
They want to go to London.
B.
They want to go to a concert.
C.
They want to go to Oxford.
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