Conclusion the tested wild strains had resistances to all 3 kinds of insecticides but their resistance factors to DDT were close to the normal strain.
结论现场品系对3种杀虫剂均产生了不同程度的抗性，但滴滴涕的抗性指数接近于正常品系。
Using integration of the normal strain concerned, several special displacement solutions under the concentrated force for a few elastic problems are obtained.
直接用应变积分的方法得到在集中力作用线下的几个弹性力学位移特解。
Using integration of the normal strain concerned, several special displacement solutions under the concentrated force for a few elastic problems are obtained.
直接用应变积分的方法得到在集中力作用线下的几个弹性力学位移特解。
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