____ you ____ your brother can join us. We want one of you.
A:Both; and
B:Neither; nor
C:Either; or
D:Not only; but also
如图①,△ABC与△CDE是等腰直角三角形,直角边AC、CD在同一条直线上,点M、N分别是斜边AB、DE的中点,点P为AD的中点,连接AE、BD.
“大师西去悲难禁,毕升功德世长流。”北宋时期,毕升发明的________,在科技史上是一个划时代的技术创新,大大促进了文化的传播( )