【简答题】世界上第一只克隆绵羊"多利"的培育过程如下图所示,图中A为黑面绵羊,B为白面绵羊。 "多利"面部毛色是什么色?原因是什么?
【单选题】根据我国《海关法》的规定,我国海关的执法范围是:
【简答题】看图,把句子补充完整 A: Is a telephone? A: Is a ? B: , it is. B: No, it . A: What's in ? A: May I ____ ____? B: It's a . ...
【单选题】– I think teenagers should be allowed to meet internet friends alone. – ________. It’s not safe enough.
【单选题】The volleyball match _______ if it rains tomorrow.
【单选题】2014年“六·五”世界环境日中国的主题为“向污染宣战”。下列做法符合这一主题的是
【单选题】克隆羊“多利”是将白面绵羊的乳腺细胞核移植到黑白绵羊的去核卵细胞中,形成重组细胞后,经过一系列培育而成。根据遗传学原理,你判断“多利”的面部毛色应是 [ ]
【单选题】2014 年世界环境日中国的主题为 “ 向污染宣战 ' 下列做法符合这一主题的是
D.
提倡步行、骑自行车等 “ 低碳 ” 出行方式
【单选题】—Shall I go and buy some food for dinner? —No, I have stored a lot in the fridge. That ______ be enough. [ ]
【单选题】— You must what I have done for you before you leave. — Well, how much does it ? Is 100 dollars enough? [ ]