M6P受体蛋白是高尔基体反面网络上特有的受体蛋白，主要起到分拣溶酶体酶的作用。
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According to the passage, Elias Howe was______.
A. the first person we know of who solved problems in his sleep
B. much more hard-working than other inventors
C. the first person to design a sewing machine that really worked
D. the only person at the time who knew the value of dreams
A．inventB．sellC．buyD．work
A. invent
B. sell
C. buy
D. work
A．seenB．directedC．shownD．made
A. seen
B. directed
C. shown
D. made
Even if we have failed, we should______.
A. not think about it any more
B. learn to accept it
C. learn to live with others
D. take it easy
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