（ ）a language requires times ang effort A Learn B Learning C To learn D Beijing learned

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• （ ）a language requires times ang effort A Learn B Learning C To learn D Beijing learned填空
• （ ）a language requires times ang effort A Learn B Learning C To learn D Beijing learned
• Only____English doesn't mean ____the language.A. to learn,tolearn B. learning,learning C. learning about,learn D.learning about,having learned请说明理由!!!!!!!!!
• Only____English doesn't mean ____the language.A.to learn,tolearn B.learning,learning C.learning about,learn D.learning about,having learned详解.
• 已知两个不同的质数p、q满足下列关系：p2-2001p+m=0，q2-2001q+m=0，m是适当的整数，那么p2+q2的数值是_．
• 已知p、q、pq+1都是质数，且p-q＞40，那么满足上述条件的最小质数p=_，q=_．