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【单选题】
锑盐净化法中常使用的添加剂有( )A.
吐酒石
B.
Sb粉
C.
丝竹石
D.
硫脲
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反馈参考答案：
举一反三
【单选题】—When did you finish ______ your report? —Last night. [ ]
A.
writing
B.
write
C.
to write
D.
wrote
【多选题】在3个柱子和3个不同尺寸圆盘的梵塔难题中,初始问题(111)=>(333)规约为三个子问题是:
A.
(111)=>(122)
B.
(111)=>(113)
C.
(122)=>(322)
D.
(322)=>(333)
【单选题】(2013·郑州高中毕业班第一次质量预测)—Did you enjoy meeting your old schoolmates at the party last week? —Yes, I did. We ________ each other since we graduated from college.
A.
haven't seen
B.
didn't see
C.
hadn't seen
D.
wouldn't see
【多选题】在3个柱子和3个不同尺寸圆盘的梵塔难题中,下面属于本原问题的是:
A.
(111)=>(122)
B.
(111)=>(113)
C.
(122)=>(322)
D.
(322)=>(333)
【单选题】听力原文：Where is the last place you had the report? (A) She was the last person to submit the report. (B) I remember having it in my car. (C) Sorry, I don't remember what it said. (5)
A.
B.
C.
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