（）是计算机的核心，通常决定了整机的型号和基本性能。
A.中央处理器
B.内存
C.硬盘
D.主机
参考答案：A
It was the dream of becoming rich _____ attracted people from all over the world to the state, ______ gold was discovered in 1848.
A．that; where
B．that; which
C．which; where
D．what; in which
二里头文化随葬品陶器中的规鬲，角（管流器）分别见于什么期墓？（）
A.二，三
B.三，四
C.一，三
D.一，二
