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【多选题】
Do you still remember the third video you watched in Lesson Two this unit? What should the passenger do with the prohibited item?
A.
Save it.
B.
Sell it.
C.
Abandon it.
D.
Deposit it.
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】设 是函数 的导函数，有下列命题： ①存在函数 ，使函数 为偶函数； ②存在函数 ，使 的图象相同； ③存在函数 的图象关于x轴对称。 其中真命题的个数为 （ ）
A.
0
B.
1
C.
2
D.
3
【多选题】When we can’t sell a passenger a round-trip ticket, what should we do as the station officers?
A.
The station officer should explain the reason why there’s no round-trip ticket patiently.
B.
The station officer could advise the passenger to buy one-way ticket and get another one-way ticket on the way back.
C.
The station officer could advise the passenger to buy a prepaid transportation card.
D.
The station officer could advise the passenger to download a payment app and pay for the journey conveniently.
【单选题】函数 是函数 的导函数，且函数 在点 处的切线为 ，如果函数 在区间 上的图像如图所示，且 ，那么 （ ）
A.
是 的极大值
B.
= 是 的极小值点
C.
不是 极值点
D.
是 极值点