A、e<sub>1sub>c<sub>1sub>F<sub>1sub>=e<sub>2sub>c<sub>2sub>F<sub>2sub> B、c<sub>1sub>F<sub>1sub>=c<sub>2sub>F<sub>2sub> C、c<sub>1sub>/c<sub>2sub>=F<sub>2sub>/F<sub>1sub> D、c<sub>1sub>/c<sub>2sub>=F<sub>1sub>/F<sub>2sub>
A、e<sub>1sub>c<sub>1sub>F<sub>1sub>=e<sub>2sub>c<sub>2sub>F<sub>2sub> B、c<sub>1sub>F<sub>1sub>=c<sub>2sub>F<sub>2sub> C、c<sub>1sub>/c<sub>2sub>=F<sub>2sub>/F<sub>1sub> D、c<sub>1sub>/c<sub>2sub>=F<sub>1sub>/F<sub>2sub>
A、必有F<sub>Rsub>=F<sub>1sub>+F<sub>2sub> B、不可能有F<sub>Rsub>=F<sub>1sub>+F<sub>2sub> C、必有F<sub>Rsub>>F<sub>1sub>,F<sub>Rsub>>F<sub>2sub> D、可能有F<sub>Rsub><F<sub>1sub>,F<sub>Rsub><F<sub>2sub>
A、F<sub>1sub>=F<sub>2sub> B、F<sub>1sub>-F<sub>2sub>=F<sub>esub> C、F<sub>1sub>/F<sub>2sub>=efα D、F<sub>1sub>+F<sub>2sub>=F<sub>0sub>
A、F<sub>1sub>=6N,F<sub>2sub>=0 B、F<sub>1sub>=0,F<sub>2sub>=6N C、F<sub>1sub>=F<sub>2sub>=8N D、F<sub>1sub>=6N,F<sub>2sub>=8N
A、F<sub>isub>V<sub>isub>=F<sub>isub>+1V<sub>isub>+1 B、F<sub>isub>V<sub>isub><f<sub>i+1V<sub>isub>+1 C、F<sub>isub>V<sub>isub>>F<sub>isub>+1V<sub>isub>+1f<sub>
A、F<sub>0.05,10,20sub> = 1/F<sub>0.95,10,20sub> B、F<sub>0.05,10,20sub> = 1/F<sub>0.05,20,10sub> C、F<sub>0.95,10,20sub> = 1/F<sub>0.95,20,10sub> D、F<sub>0.95,10,20sub> = 1/F<sub>0.05,20,10sub>
A、F<sub>0sub>、F<sub>1sub> B、F<sub>0sub>、F<sub>2sub> C、M<sub>1sub>、M<sub>2sub> D、P<sub>1sub>、P<sub>2sub> E、Vm<sub>1sub>、Vm<sub>2sub>
A、a<sub>1sub>f<sub>csub>bx<f<sub>ysub>A<sub>ssub> B、a<sub>1sub>f<sub>csub>bx>f<sub>ysub>A<sub>ssub> C、a<sub>1sub>f<sub>csub>bx=f<sub>ysub>A<sub>ssub> D、a<sub>1sub>f<sub>csub>bx≦f<sub>ysub>A<sub>ssub>
A、粗砂μ<sub>fsub>=3.7—3.1中砂μ<sub>fsub>=3.0—2.3细砂μ<sub>fsub>=2.2—1.6 B、粗砂μ<sub>fsub>=3.7—3.3中砂μ<sub>fsub>=3.2—2.5细砂μ<sub>fsub>=2.4—1.6 C、粗砂μ<sub>fsub>=3.7—3.2中砂μ<sub>fsub>=3.1—2.4细砂μ<sub>fsub>=2.3—1.6 D、粗砂μ<sub>fsub>=3.7—3.0中砂μ<sub>fsub>=2.9—2.2细砂μ<sub>fsub>=2.1—1.6