A 1 B 0 C 2 D 1/2

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101724_1185.jpg" width="38" height="40" /> B x2 C 2x D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101728_3686.jpg" width="32" height="37" />

A (-∞，+∞) B (-∞，0］ C (-1，1) D ［0，+∞）

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101738_1498.png" width="145" height="18" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101742_1029.png" width="125" height="19" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101746_3061.png" width="155" height="38" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101755_5716.png" width="136" height="38" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101800_2591.png" width="148" height="40" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101804_4778.png" width="149" height="40" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101808_2278.png" width="160" height="39" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101812_2747.png" width="230" height="20" />

A dx+dy B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101820_0246.png" width="105" height="38" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101823_7746.png" width="105" height="37" /> D 2(dx+dy)

A I1=I2 B I1>I2 C I1<I2 D 无法比较

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101835_5245.png" width="141" height="29" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101839_9231.png" width="141" height="29" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101844_3682.png" width="151" height="29" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101848_0557.png" width="141" height="29" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101855_8681.jpg" width="95" height="61" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101859_6962.png" width="114" height="32" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101903_1493.png" width="93" height="32" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101906_7118.png" width="93" height="36" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101910_3212.png" width="193" height="20" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101914_9529.png" width="148" height="18" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101918_6347.png" width="203" height="20" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20190828101922_2430.png" width="193" height="20" />