色www,五月婷婷深爱五月,午夜国产一级片,色噜噜综合,国产大胸无码视频,清纯美女被操黄网站在线观看,波多野结衣av高清一区二区三区

W(xu)W(wng) > иԇ > 俼иxҪcęC(j)

俼иxҪcęC(j)

l(f)rg:2017-06-29݋f

иx俼^]һc“ęC(j)”Dzе!҂xY}}ȷ涼ҪзмɵM(jn)С@“ęC(j)girl”o]Ďc“ęC(j)ؼ”ȡиx߷

ęC(j)һ俼(jng)ҪW(xu)Yx{(dio)

F(xin)ڸW(wng)վx俼(jng)ͼкܶ@Щ(ni)݌҂Ă俼ЎǴҪW(xu)YxҪһEҪW(xu)(j)ԼČHrM(jn){(dio){(dio)֮ǰһҪM(jn)֪Լˮƽ~RZwϵLyֻг˽ԼĆ}cᘌԵĽb俼(jng)ԼĂ俼|(zh)

ęC(j)俼YJ(rn)(zhn)TPO

ĕrg࣬ͲҪ؝İϵY϶^ֻҪTPO1-48}ȫŪͬW(xu)ҲǿȡÝMijɿ}^Ҫķexxɺʹ}@Щ܎_

ęC(j)}һԭĞ(j)

иx}һ֌W(xu)ǐ뮔(dng)ȻԼ˼SʽM(jn)x@xĴ𰸺ܶr¶e`Сһһ}Ŀ

According to paragraph 4, what aspect of extinction episodes does the companion-star hypothesis supposedly clarify?

A. Their location

B. Their frequency

C. Their duration

D. Their severity

companion star hypothesisP(gun)I~λһThe possibility that mass extinctions may recur periodically has given rise to such hypotheses as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits, making some of them fall to Earth as meteors and causing widespread devastation upon impact.fmass extinctionķ(f)l(f)֧companion star hypothesis@hypothesisf܉׃Ό(do)һЩwƫx܉ɞEǵԭfҴΰl(f)܉extinctionlB}һҪԭĞ}ɣȡиx߷

Ŀ]