и һ(xing)ҪĿc(din) l(f)]ԇ͕pһЩСи и
}һ}ӛ˹Pӛ](yng)}Ŀӛ˹Pӛ]
ܶ˶(yng)ӛ˺ܶPӛ}ĕrs֪ԓ߀ώnx(xing)ǵ҅sl(f)F(xin)]ôrgҁff@ôνQ
1.W(xu)ӛĹPӛ
ĹPӛӛey]зֶεR]c(din)̖ߣѹPӛ Ūһӛ˺ܶ~һӵc(din)]ӛֻ㮔(dng)r~RԼJ(rn)Rô@NrӛùPӛǟoЧ㲻֪ӛʲôҵĕr϶ҵôQDZMӛPӛĕrΣзֶRc(din)̖ƽrӖ(xn)ԼW(xu)s
2.(j)x(xing)ȥPӛ
҂l(f)F(xin)ʹfСԇ߀ ĕr@rƽrӖ(xn)ĿץP(gun)I~ıܾ͑(yng)ԓwF(xin)¿M(jn)ֻܑ{ܿץסXҪ~R ~R(@ҪƽreӖ(xn)صԒÿᆖشӛImportantӛ)@rĹPӛҲnjƶǶ^y҂Ҫ}ɺx(xing)ȥƹPӛķ(j)ŵλúx(xing)P(gun)I~RČ(yng)ȥҹPӛ
1)҂Ҫ}(j)}P(gun)I~ȥλPӛӛ}~Rôͱ^ȥλЩ}Ŀ@һֱ͉ҵ𰸡ͨ@ʧ
2)ʧ҂ҪҪؿPӛ]õģM(fi)rgҪ_ʼx(xing)x(xing)ĕr҂Ҫ(j)Լ һЩƬϢƽre۵Իx(xing)߅߅ųF(xin)^~RĕrԭЛ]Ќ(yng)]оų@ЩϢ]ᵽԭ෴Pӛλò(yng)ȵȡ
@rl(f)F(xin)һ㶼ų2߀ʣ2
3)ʣ@ɂ߀ЎN
a. x(xing)P(gun)I~_(d)˼ȥPӛλ(yng)ҵ˼Č(yng)ô@x(xing)njע˼Č(yng)һԭ~@Pӛ~Rx(xing)бČҲܛ]ČֻҪӵĺ˼(yng)˾Ϳ@rc(din)(yn)?zi)Ŀx(j)(jng)(yn)Ԓ}ܶԭ~?yn)ҲøĿԒ}x(xing)ܶͬxČ
b. x(xing)~(yng)߀Ǜ]Ќ(yng)ϡ@rֻһٌһɂx(xing)ųһӲVܿ϶@һe`Ϣx(xing)ߣxN}x(xing)һ㶼(dng)Ȼ@NL(fng)UܱCٷְɶҲ] @һоֻ^҂мg(sh)!
}˺ܶζ18-22ַ(ni)(f)(x)˺ܾ ˺ܾ߀Dz
ЂͬW(xu)f 18Ȼf P(gun)Ic(din)˷@ӵԭ“] P(gun)Ic(din)Ѓɂԭ
1֪ P(gun)Ic(din)Ծ͛]ӛPӛ;
2 ˣǛ] P(gun)Ic(din)”ķN?
X18ֵr(yng)ԓǃɷNе
һҪӖ(xn)P(gun)Ic(din)һ㶼ʾ̖ҪʾԼ@Щrc(din)ԅY(ji)(gu)
ڶҪ ԾӞλ ˼Ŀ(bio)һһҲ2-3һ𣬾(x)ץȡ˼ ҪѲJ(rn)RĆ~ժ ǿƌW(xu)
һµʹ(yng)ԓǣ
1. Pӛ}ȫĵ߉ȫĵĴ ӛPӛҪܷͣӛҪc(din)]ӛٷ(f)@^̡@Ǿ(x)ģr£ץϢץҪc(din)
2.x(xing)_x(xing)(yng)ԭĂ~ĂӣʲôǰǷʾe`x(xing)ʲôeĂ~ReҪ(zhn)
3. һһҪ 2-3 ͲҪ~R}ԭ һժ~^ȥҪM(fi)rg
4.ھ ^Ҽ(x)С̖~߉磺actually, in fact, problem, special, but, however, evidenceȵȣ潛(jng)c(din)һƪ¿Y(ji)10-20@ӵrl(f)F(xin) ͺB(yng)ϲg10ƪõr£h15ǰ}Ŀ}Ŀ
5.Ҫ߷(yng)ٶȡ߀ֹͣr ȫƪc(din)Ϣ@P(gun)I~ (x)ץȡӵP(gun)I~˼߷(yng)ٶȺ;(zhn)ȡÿһƪ͉
@ӈ(jin)1-20ƪTPOкܴի@
}и y҂ԓôk?
1.ҪM}z´ٰћ] һ@h(yun)h(yun)Ҫ м(x) ˼֮gP(gun)ϵ֮gP(gun)ϵc(din)ʾ~ͺҪ P(gun)I~ҪҜ(zhn) ֮ҪP(gun)I~ Ѿ ЄP(gun)I~һ P(gun)I~ ٶɂǻ
2.Ҫx(xing)һx(xing)e?yn)ʲô(yn)ʲôҪx(xing)߅@B(yng)_}˼·ÿεe}ҪΪ(d)e`ԭǛ] Ҋˣe?Լ͕ҵԼe`ʽ͕x(xing)}ĕr@_ҵ_
3.(f)(x)Pӛ҂һֱ(qing){(dio)ξ(x)ӛٶ´`fҪ@ˡُ(qing){(dio)һPӛless is more ԽԽáӛúܶɶҲ] ᱾ĩ Pӛoþ ԽԽ࣬PӛԽԽPӛP(gun)I~ һǰ߾Ԕ(x)
Y(ji) }--(f)(x)Pӛ-- Һ˼P(gun)I~R--P(gun)I~ --x(xing) (x(xing)ԷڵڶҲԷһ)eƽr(x)Xõһӏ(qing)ڿoB(ti)ZٿĕrRΣ(wn)l(f)]F(xin)ƽr_ʸץϹr
}ģи Pӛs̖
и PӛҪW(xu)(x)s@Ӳ܉?q)ĉ?߀` (ni)ݡһ~R҂hȡǰ3-4ĸgoĸ磺meteoritesmete rt @ӾͲñbܶs̖F(xin)ڽo ؏(f)ʱ^ߵĆ~ôǰÿs̖(ji)ʡܶrgϣ