A <img width="26" height="62" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231108_0708.gif" />． B -<img width="26" height="62" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231108_0708.gif" />． C 1． D 不存在．

A <img width="204" height="41" src="https://www.beizhujiaoyu.com/uploads/202208/20211027010824_1967.jpg" /> B <img width="204" height="41" src="https://www.beizhujiaoyu.com/uploads/202208/20211027010825_2526.jpg" /> C <img width="91" height="41" src="https://www.beizhujiaoyu.com/uploads/202208/20211027010826_3197.jpg" /> D <img width="92" height="41" src="https://www.beizhujiaoyu.com/uploads/202208/20211027010827_3842.jpg" />

A 极限不存在 B 极限存在但不连续 C 连续但不可导 D 可导

A 当f(x)为奇函数时，F(x)必为偶函数 B 当f(x)为偶函数时，F(x)必为奇函数 C 当f(x)为周期函数时，F(x)必为周期函数 D 当f(x)为单调函数时，F(x)必为单调函数

A 连续但不可微 B 偏导数存在但不连续 C 可微 D 连续但偏导数不存在

A I₁<I₂<I₃． B I₃<I₁<I₂． C I₁<I₃<I₂． D I₃<I₂<I₁．

A <img width="50" height="38" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231941_7255.jpg" /> B <img width="45" height="37" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231943_1317.jpg" /> C <img width="43" height="32" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231943_8817.jpg" /> D <img width="44" height="37" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231945_2411.jpg" />

A α₁，α₃，α₄线性无关． B α₂，α₄线性无关． C α₁，α₂，α₃线性无关． D α₃，α₄线性无关．

A ①②. B ①④. C ③④. D ②③.

A r₁<r₂<r₃ B r₂<r₃<r₁ C r₃<r₁<r₂ D r₁<r₃<r₂