目前核电站利用的核反应是[ ]
A．裂变，核燃料为铀
B．聚变，核燃料为铀
C．裂变，核燃料为氘
D．聚变，核燃料为氘
答案：A
强制换羽一般不应用于（）。
A、降低引种费用
B、赢利措施
C、后备鸡衔接不上
D、蛋价格高峰期
You are creating something out of nothing, ________ means, in one sense, ________ none of it is true.
A．that; that
B．which; that
C．which; which
D．that; which
