2. 外语
  3. Leptin is effective in reducing weight but it’s many years away before humans can use it. Both obese mice and normal mice can p

Leptin is effective in reducing weight but it’s many years away before humans can use it. Both obese mice and normal mice can p

admin2013-06-17  60
问题 Leptin is effective in reducing weight but it’s many years away before humans can use it.
Both obese mice and normal mice can produce leptin in their bodies.
选项 A、Y
B、N
C、NG
答案B
解析 参见第五段第四句：But the obese mice cannot produce leptin．．．
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大学英语四级

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