A <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923153846_1185.gif" height="27" width="28" /> B {1} C {-1} D {1，-1}

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155034_8150.gif" height="28" width="78" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155042_9250.gif" height="28" width="95" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155051_4570.gif" height="27" width="80" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155058_3013.gif" height="22" width="147" />

A 400 B 200 C 100 D 50

A 3/5 B 1/2 C 2/5 D 3/10

A x=2 B x=1 C y=2 D y=1

A 1/36 B 1/18 C 1/9 D 1/6

A x=2 B x=-2 C x=1 D x=-1

A π/6 B π/4 C π/3 D π/2

A 第一、二、四象限 B 第一、二、三象限 C 第二、三、四象限 D 第一、三、四象限

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155317_6560.gif" height="38" width="38" /> B 1/2 C -1/2 D <img src="https://www.beizhujiaoyu.com/uploads/202208/20150923155326_8130.gif" height="38" width="38" />