恒温恒压下，可逆反应达到平衡时，下列关系式正确的是：
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- 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" />
- 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" />
- 真空中两块相互平行的无限大均匀带电平面A和B，A平面电荷面密度为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/5a974aa307644728ad727db9bd36dac7.png" />， B平面电荷面密度为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/649c91caf58f410698c2b97afebac7af.png" />，两板间距离为a，当一点电荷q从A面移到B面时电场力作的功为： A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/add10ccf53eb4b489eef9dc1e0843c3b.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/cf8dde3f211247a18ddb64f5734c88e2.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/85e25cb4e0dd49eba7f8f1dfad77e045.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202004/a36e1713d2fd472fa6c1259ccc0706d4.png" />