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【多选题】
下列关于数据库中的概念模型,描述正确的有( )。A.
具有较强的语义表达能力
B.
按照用户的观点建立数据模型
C.
是数据库设计的有力工具
D.
表述较为抽象，不易理解
E.
依赖于特定数据库管理系统中的数据模型
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【简答题】听力原文：Playing table tennis is good for your health.
【简答题】My favourite sport As we know, sport is an important part of our life.I am interested in sport and I do sports every day. My favourite sport is playing table tennis . It is a healthy and popular sport...
【单选题】—Where isMr. Zhao? —He ______to Mount Fanjing. He’ll come back ______ a week.
A.
has been; in
B.
has gone; after
C.
has gone; in
D.
has been; after
【简答题】HXD3电力机车转向架采用整体轴箱、推挽式（）等技术。
【单选题】-__________ -I‘m fond of playing table tennis.
A.
Do you like sports?
B.
Which sport do you like best?
C.
Playing table tennis is fun.
D.
Is playing table tennis your favorite thing to do?
【简答题】按照要求改写句子 Gao Shan‘s sister likes playing table tennis.(改为否定句) Gao Shan’s sister __________ ________ playing table tennis.
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