下列有关我国的地理差异,叙述正确的是:( ) A 自南向北,纬度逐渐升高,气温逐渐升高。 B 自西向东,我国地势呈阶梯状分布,逐级下降。 C
Lily called me _________ Friday morning and told me she was having a birthday party _________ me tomorrow.
果蝇是进行遗传实验的良好材料,现有三管果蝇,每管中均有红眼和白眼(相关基因为B和b),且雌雄分别为不同眼色。各管内雌雄果蝇交配后的子代情况
下面各句中,没有语病表意清楚的是( )(2分) A.是否能学以致用,是一个人在事业上取得成功的前提。 B.通过“学会感恩”主题班会,
已知⊙C:x2+y2=1,点A(-2,0)和点B(2,a),从点A观察点B,要使视线不被⊙C挡住,则实数a的取值范围是A.(-∞,-1)∪(1,+∞) B.(-
I still feel________about the error in the accounts;I ought to have noticed it,and pointed it out. A.shameless B.regrettable C.guilty
下列各选项中,后者不属于前者的是( )A.酸、硫酸 B.碳酸盐、Na2CO3 C.化合物、氧化物 D.钾盐、KOH
―Where would you like to go? ―I don't mind _____ I go; I will go _____ you want to go. A. where; the place B. where; wherever C. the place; wherever