一种黄铜有锌、铜按3:7熔铸而成,要生产110吨这种黄铜,需锌和铜各多少吨?
锌:110×33+7=33(吨)
铜:110×73+7=77(吨)
答:需锌33吨,铜77吨.
Eat any cake you like and leave the others for ______ comes in late.
A.who
B.whom
C.whoever
D.whomever
哪种畸形具有遗传性,为X连锁隐性遗传()
A.女性假两性畸形
B.男性假两性畸形
C.真两性畸形
D.混合性生殖腺发育不全
E.单纯型生殖腺发育不全