皮皮学，免费搜题
登录
搜题
【单选题】
If average profit increases with output marginal profit must be:A.
decreasing.
B.
greater than average profit.
C.
less than average profit.
D.
increasing.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】用0.1 mol·L -1 HCl滴定0.1 mol·L -1 NH 3 ·H 2 O(P Kb =4.7)的pH突跃范围为6.3~4.3, 用0.1 mol·L -1 HCl滴定0.1 mol·L -1 的某碱(P Kb =3.7)的pH突跃范围则是:( )
A.
6.3~4.3;
B.
7.3~4.3;
C.
6.3~3.3;
D.
7.3~3.3
【单选题】—I’m so sorry for losing your dictionary. —______ [ ]
A.
Oh, it doesn’t matter.
B.
You’re welcome.
C.
That’s OK.
D.
Thank you all the same.
【单选题】— I’m very sorry for the mistake I’ve made.— It’s OK. ().
A.
That can happen to the rest of us.
B.
What’s the matter with you?
C.
Why are you so careless?
D.
You should be responsible for it.
【单选题】—I’m so sorry for losing your dictionary. —_______
A.
Oh, it doesn’t matter.
B.
You’re welcome.
C.
That’s right.
D.
Thank you all the same.
【单选题】用0.1mol·L-1HCl滴定0.1mol·L-1NH3·H2O的pH突跃范围为6.3～4.3，若用0.1mol·L-1HCl滴定0.1mol·L-1的某一元弱碱(pKb=2.7)，则其pH突跃范围为
A.
6.3 ～ 2.3
B.
8.3 ～ 2.3
C.
8.3 ～ 4.3
D.
4.3 ～ 6.3
【单选题】I really wish I could_________! I’m so sorry for what I have done! Jane, could you tell me what I shall do now? How I can repair the wrong I’ve done her
A.
take pack my worth
B.
take back my words
C.
take back my worlds
相关题目：