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【单选题】
镰刀形贫血患者,其血红蛋白β链N端第6个氨基酸残基谷氨酸被下列哪种氨基酸代替A.
丙氨酸
B.
缬氨酸
C.
甘氨酸
D.
赖氨酸
E.
色氨酸
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【单选题】—Why ______ you _______ give such a talk? —Well, I've applied for this job. They've asked all the applicants to give a talk as part of the selection process. [ ]
A.
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【简答题】This is a talk by a London taxi driver. 'I've been a taxi driver for nearly ten years. Most London taxi drivers have their own taxis.' 'It's a nice job most of time. you meet a lot of people. I always...
【简答题】阅读理解。 This is a talk by a London taxi(出租车)driver. 'I've been a taxi driver for nearly ten years. Most London taxi drivers have their own taxis.' 'It's a nice job most of time. you meet a lot of people...
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