设D：全总个体域，F(x)：x是人，H(x, y)：x与y相同，L(x, y)：x与y一样高。则命题“任何两个不同的人都不一样高”的逻辑符号化为（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/4b94c698d08f4a04b660d5b6efb30089.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/786309b3ecdd4425922f5494966fa07d.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/0a4682e71855487ea0a81c3c14185b0b.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/7c7bc9a8ab404881aa4b2624a45e3575.png" />

设D：全总个体域，F(x)：x是兔子，G(y)：y是乌龟，H(x, y)：x比y跑得快。则命题“并不是所有的兔子都比乌龟跑得快”的逻辑符号化为（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/4bf8891b2d6d48a588928ad6f1a11f46.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/405b0750d62148f29762b2dc436abdc9.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/f6a0186c98564711b88c7131613565b4.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/bbb70672339d498099c2a685f51ea16a.png" />

设函数在点x=0连续，则a，b的值分别为（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/7cd792b3b2154253b5718bfeca87537c.png

已知极限则a=0,b=6（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/b97eda7869144de1b30a6b2cb3e0fdfc.png

设D：全总个体域，F(x)：x是病人，G(x)：x是医生，H(x, y)：x相信y。则命题“所有的病人都相信医生”的逻辑符号化为（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/3bdf051eb63a487ebe8cee0b418e2422.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/bfae84737f674bd0b1d8ba7d206c1edf.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/d6d343e235594926aec9dbfcc9ef4b30.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6d189695377347739a4c0478956d9248.png" />