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W(xu)W(wng) > иԇ > иԇx~RB

иԇx~RB

l(f)r(sh)g:2017-07-26݋׿s

(yng)îI(y)W(xu)W(wng)Ӎ
     иx~R俼һֱԁ(li)DZ^ܠ(zhng)hԒ}ЩJ(rn)иx~R俼ҪӢZ(y)ļ(j)ˮƽЩ˄tJ(rn)иx~ԽԽá@ɷNe(cu)`҂?c)?x)˽иx~RЌI(y)~RĜ(zhn)䣬ϣ(du)
 
    иxҪ֪һc(din)I(y)~R@٣^Ǻy܌~R
    1.иx~RƫڌI(y)|(zh)ԭ@ӣиԇǞ˿ӢZ(y)ˮƽܷCڴW(xu)W(xu)(x)I(y)֪R(sh)˿ă(ni)ƫ،W(xu)g(sh)ķxҲĴW(xu)nĺ(jin)׃(ni)xȡڱ~ĕr(sh)?q)ڌW(xu)g(sh)~

    2.иxČI(y)~Ry@c(din)ҲǺȻ?yn)иһTӢZ(y)ˮƽԇֲnjI(y)ԇy^ČI(y)~Rxд_(sh)(hu)F(xin)ǿă(ni)˼Ժ׵ز³(li)e(g)ӣIt should be obvious that cetaceans--whales, porpoises, and dolphins--are mammals@OGx}еһ(g)ԭ䡣@Ԓеcetaceanһ(g)^(gu)֌I(y)o(w)豳Ć~ֻҪJ(rn)R(sh)whalesdolphinsmammals֪cetaceanˮ()(dng)(dng)@ஔ(dng)֪cetacean˼Ҫӛmammalwhaledolphin@N^õČI(y)~Rcetacean@NƧѾڱ@NDĆ~Ǻֵܲõ
 
   3. иxҪ6(j)ϵ~RҪӛ(du)õČI(y)~R^(du)ҪѾƧČI(y)~R?yn)Dzиxă(ni)ݡиx~R俼ҪȲpҕҲ܁yһͨxıҵ俼c(din)иxͿõMķ?jn)?sh)

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