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【单选题】
石油中的含硫化合物按性质可分为活性硫化物和非活性硫化物，下面属于非活性硫化物的是（）A.
硫
B.
硫化氢
C.
硫醇
D.
硫醚
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
【简答题】绘词法
【简答题】关键词法
【判断题】Information is material if its omission or misstatement could influence the economic decisions of users.()
A.
正确
B.
错误
【单选题】To remain competitive in the international market place, U.S. industries have recognized that they must attract the brightest, most______ young people available.
A.
committed
B.
dedicated
C.
determined
D.
contributed
【简答题】A—International Market Price B—Landing Charges C—Application Number D—Current Price E—Favorable Balance of Trade F—Customs Duty G—Principle of First to Use H—Home Trade I—Industrial Property J—Famous ...
【简答题】Omission is the only source of error in the second language acquisition.()
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