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【单选题】
某氧化物X难溶于水，能与烧碱反应，生成易溶于水的化合物Y，将少量Y溶液滴入盐酸中无沉淀生成，则X是 ( )。A.
SiO 2
B.
Al 2 O 3
C.
MgO
D.
CuO
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举一反三
【单选题】案例《星空日记》播放地址:( https://mooc1-2.chaoxing.com/resourcescontroller/showpreview?attachmentId=154851711&courseId=204942477&fid=44047&knowledgeId=171897783) 中的主人公( )家境贫寒,但是刻苦学习,考入了北京大学.
A.
李晓东
B.
何晓东
C.
张晓东
D.
王晓东
【简答题】预应力钢筋混凝土构件制作的基本方法有 与 。
【简答题】How did customers feel about the service staff? The service staff were not always______.
【单选题】案例《星空日记》播放地址:( https://mooc1-2.chaoxing.com/resourcescontroller/showpreview?attachmentId=154851711&courseId=204942477&fid=44047&knowledgeId=171897783) 主人翁通过高考的被北京大学的什么专业录取( )
A.
经济学
B.
法律学
C.
天文学
D.
美术学
【单选题】The company is most worried about how
A.
quickly staff answer the phone.
B.
efficiently staff deal with enquiries.
C.
friendly staff sound on the phone.
【简答题】Task 5 Staff Turnover As several members of staff have recently left the company you work for, the management is investigating the situation. You have been asked to make suggestions. Discuss, and deci...
【单选题】What does the woman suggest the man do?
A.
Reschedule the staff meeting
B.
Cancel the staff meeting
C.
Meet as originally planned with staff
D.
Find a larger room to meet in
【简答题】十进制数88,其对应的二进制数是( )
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