观察偏倚又称
A.Neyman偏倚B.选择偏倚C.Berkson偏倚D.信息偏倚E.混杂偏倚
参考答案:D
He _____ to us that those eggs which were _____ on the table had been _____ by snakes.
A.lied; laying; lied
B.lied; lying; lain
C.laid; laid; laid
D.lied; lying; laid
实现不同网络协议之间转换的设备是______。
A.repeater
B.bridge
C.router
D.gateway