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【判断题】
当某种物品的边际效用为负时,总效用达到极大值A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】通过掌握宗炳的艺术观念,认同宗炳的艺术思想,一个带有自己艺术追求的文人,也可以通过山水特别是山水画,这个可以卧游观赏的介质,来体会山水之美。这个新的时代就叫做“山水畅神”。
A.
正确
B.
错误
【单选题】Customer: ______. Waiter: I'm sorry. Didn't you order fried shrimp? Customer: I ordered fried chicken. Waiter: Oh, all I heard was fried shrimp. Let me have kitchen redo this for you.
A.
Sorry, this isn't my dish
B.
Excuse me, this isn't what I paid for
C.
Sorry, this isn't my order
D.
Excuse me, this isn't what I ordered
【单选题】When she found the steak was overcooked, she ( ) to the waiter.
A.
motioned
B.
mentioned
C.
moved
D.
memorized
【简答题】Los haitantes principales de Perú son los________ y los________.
【单选题】–Waiter, $ 20 for dinner, right? --I’m afraid $25, sir, for drinks are ________.
A.
extra
B.
free
C.
high
D.
spare
【单选题】听力原文：W: Sir, I waited ten minutes at the table before the waiter served me. M: Sorry, Ma'am. It has been very busy tonight. Q: Where does the conversation most probably take place? (14)
A.
In a bank.
B.
In an office.
C.
In the hospital.
D.
In the restaurant.
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