佳创兴2015 发表于 2022-6-9 19:47:18

6.9
a front desk
a guest
a sticker
have a pleasant day

佳创兴2015 发表于 2022-6-10 21:31:45

Is there a bank that's close to the hotel?                            Yes, there is a bank which is 500 meters away from the hotel .

佳创兴2015 发表于 2022-6-11 22:11:02

I'd like to order the set breakfast that comes with pancakes.

iyxx37 发表于 2022-6-12 09:54:40

6.11求极限6.12无穷极限

iyxx37 发表于 2022-6-12 19:56:50

6.12连续性

iyxx37 发表于 2022-6-12 20:46:59

切线6.12

iyxx37 发表于 2022-6-13 07:33:42

6.13导数

iyxx37 发表于 2022-6-13 08:17:08

6.13变化率

iyxx37 发表于 2022-6-13 21:02:48

6.13积商负冪的导数

iyxx37 发表于 2022-6-13 22:29:56

6.13三角函数的导数
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