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1
The result shows that permeability modulus, threshold pressure and fracture length all have effec. . .
渗透率模数和拟启动压力梯度越大，裂缝越短，气井产能越小。
2
The paper appeals to the whole society for paying great attention to and taking comprehensive effec. . .
文章呼吁全社会对此给予充分重视并进行全方位的治理。
3
Developing students self-confidence of learning effec-tively in teaching classes on ice
冰上教学中学生自我效能感的培养
4
Effec-ts of bacterial manure on nutritional status and yields of rice
生物菌肥对水稻营养特性及增产效果的初步研究