A ①②． B ③④． C ①③． D ②④．

A f(x)，g(x)，h(x) B h(x)，f(x)，g(x) C f(x)，h(x)，g(x) D h(x)，g(x)，f(x)

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

A <img width="67" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506144528_9141.jpg" /> B <img width="68" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506144530_6641.jpg" /> C <img width="67" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506144531_0703.jpg" /> D <img width="66" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506144533_1953.jpg" />

A r(A)=r(A^T)=m． B r(A)=r(A^T)=n． C <img src="https://www.beizhujiaoyu.com/uploads/202208/165166681533461.png" width="159" height="45" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/165166681972211.png" width="218" height="45" />

A α₂，α₄． B α₁，α₂，α₃. C α₁，α₃，α₄． D α₂，α₃，α₄．

A <img width="31" height="25" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153030_8988.jpg" /> B 0． C <img width="18" height="25" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153031_5706.jpg" /> D <img width="16" height="25" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153033_2581.jpg" />

A 25． B <img width="71" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506145003_6731.jpg" /> C <img width="18" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506145005_6175.jpg" /> D <img width="72" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506145005_8363.jpg" />

A <img width="59" height="25" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153149_5863.jpg" /> B <img width="82" height="27" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153149_9457.jpg" /> C <img width="30" height="26" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153151_8676.jpg" /> D <img width="33" height="26" src="https://www.beizhujiaoyu.com/uploads/202208/20220506153152_1175.jpg" />