【单选题】Spemann 将蝾螈的早期原肠胚的表皮外胚层移植到另外一个早期原肠胚的神经外胚层区域,该移植块将分化成为( )。
【单选题】Barthel 指数是用于评定( )的方法
【单选题】能完成两个1位二进制数相加并考虑到低位来的进位的器件称为( )。
【多选题】74LS138是3线-8线译码器的一种,该电路能具有的功能是
【多选题】What does the President’s Cabinet do in America?
C.
meet to make decisions
【单选题】听力原文:Woman: The president got what he wanted out of the television industry last week... a pledge to develop the rating system in America based on which the electronic V-chips could automatically bloc...
A.
It will automatically rate the TV shows so as to protect children from sex and violence.
B.
It will block out the offensive parts in a TV show.
C.
It will enrich people's life by offering a variety of TV programs.
D.
It aims to help parents to have a better control on what children should watch on TV.
【单选题】Barthel 指数是用于评定 ( ) 的方法