<img src=http://60.205.157.60/course/a@6DA4B2650DCF91EB32525C71049AED56.png title=W_LB8~I@6XIN2L{{WXQ25R8.png alt=W_LB8~I@6XIN2L{{WXQ25R8.png/>

【单选题】【消耗次数：1】

① A

② B

③ C

④ D

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