卡拉库尔羊灰色基因显性纯和致死,灰色公母羊交配存活后代中灰色所占的比率()。
A.1/2
B.3/4
C.1/3交
D.2/3
参考答案:D
0.01mol/L的H2S溶液中,下列关系正确的是[ ]
A.c(H+)=c(OH-)+c(HS-)+c(S2-)
B.c(H2S)>c(HS-)>c(H+)>c(OH-)
C.c(H2S)>c(H+)>c(HS-)>c(S2-)
D.c(S2-)+c(HS-)+ c(H2S)=0.01mol/L
—I wonder Tom will come to our party.
—He will when he finishes his work, I think.
A.how
B.whether
C.that
D.what