若产生主动土压力为Ea，被动上压力为Ep，所需的档土墙位移量分别为<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/1e8f0b9e0cb8465593753c5f11598176.png" >、<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/9088e679a4184965804bc72eeb0a0d41.png" >，则下述()是正确的。 A: Ea＜Ep，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/7a1afdb198494646a3e13d5a5fc63803.png" >＞<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/9088e679a4184965804bc72eeb0a0d41.png" > B: Ea＞Ep，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/7a1afdb198494646a3e13d5a5fc63803.png" >＜<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/1e329449603e4588bd4943ce452bde27.png" > C: Ea＞Ep，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/1e8f0b9e0cb8465593753c5f11598176.png" >＞<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/9088e679a4184965804bc72eeb0a0d41.png" > D: Ea＜Ep，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/7a1afdb198494646a3e13d5a5fc63803.png" >＜<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/9088e679a4184965804bc72eeb0a0d41.png" >

下列汉字，不是会意字的有（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/3745c24ad6b741e1b0515f6f78732902.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/f2a234fa226e4c2283d973264d41a1cf.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/e727986add1f4513b034e96ba2a88137.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/5a95cc0dd6e64226a205a4ef6185f991.png" />

下列微分方程中为常微分方程的是（） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/cbf228ed319846a786045d6f0d92c025.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/14d9810e378e4a9aa35b205b9bd1bfad.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/a9b59e4bfb9e4db6893102d624b7c7c1.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/8f273eb6feb642e2850f4654eae6b238.png" >

下列汉字中是象形字的有（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/8cecee6c952546deb3a1cefc3a98d641.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/7f6c55d56ebc4497913c8b2d9c761bf3.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/8f5a8473ecfe40a09b7f49bfea126107.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/cf93cf19ebae41d999f0229253098fe7.png" />

下列汉字，是指事字的有（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/a78009bbfc6443ad832d8ed215f9ec60.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/4ef5ae27ef2342e69844ef4cdd833c71.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/117a39b9b1bd4666b7c705a3868877b8.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/5635b12d2e9d479697bab0ec3e94eb4d.png" />

下列那个反应在反应过程中能生成碳正离子中间体？（） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/8b944ee7075041be92f60cc9d1c6dc0c.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/f406e4cb711c4b1cab88b2f238a3a886.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/41c9e4ca3e7942b086e173cf6c71a45d.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/ab040348ce1a4b0c8da1805df17c3906.png" >

以下方程中能够说明磁场是非保守力场的是 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/c992e53d52334d1f8d60b01cfdbb942b.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/6b6bd95128d046b3adb3ff7af56f3920.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/cf765a59cc8a46cabc72150a545e54db.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/f588bc33929f49e9b0cecccdb0d164e1.png" />

恒温恒压下，可逆反应达到平衡时，下列关系式正确的是： A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/14235e8fd11a44c89c953ff541fa1504.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/70016c166b8a47f19cfeba63da858e6f.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/f846aca457ea41bca91053f4d9d84449.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/e4b47257d5814e6fb45de9d47ee9965a.png" />

下列化合物在碱性条件下与水反应活性最大的是（）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/406bdbdf0a5846b5999d5e6e856df268.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/5e91d438399146d8b423b2f88e676fe9.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/3c75eaa7ec1f4545b3bde86157628880.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/0d3304fae4274d339f5331f81c9b46ff.png" >

直角坐标下，无内热源、常物性一维非稳态导热问题的导热微分方程是() A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/f2c93fdbb58c4eea9f29ddc8f37e0943.png"/> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/2e37d9ca170d419582a5d6dbab09b76e.png"/> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/ef11632d8c6a490ab5fa94c51647b92b.png"/> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202004/96d7f423d7f04ee785ac2d03e6ff9b93.png"/>