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【单选题】
听力原文: Could I have your attention please? Thank you. As I told you this morning, this afternoon is our shopping afternoon. If you have a look at the back page of your tour programme, you'll see a little map of the city centre, with the names of some of the shops marked. As you won't have too much time, I'm just going to explain to you what they sell. We're now in the Friendship Shopping Centre. On your right is Larp's, a very good place for shoes and boots, rather than gloves, bags, clothes or others. Opposite that is Li Ning, a good place for sports goods, not cheap, but really pretty. Next door to Li Ning is a place for books. They have got books on almost every subject anyone has ever written about, airplanes to animals, but Chinese only--so none of your English books I'm afraid. If you walk along, there are shops which sell cameras, radios, and so on, which you won't buy, I'm afraid, if you are tired or would like to have a nice cup of afternoon tea, I suggest Splend Tea Shop, where you can have British afternoon tea, with very good home-made cakes, chocolates and others. The shop is two blocks away from here, but within walking distance. What does the speaker do most probably?
A.
He's a teacher.
B.
He's a tour guide.
C.
He's a shop assistant.
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【多选题】有布线问题的分支限界法说法正确的是()
A.
布线问题可以用队列式分支限界法,也可以用优先队列式分支限界法。
B.
布线问题只能用队列式分支限界法。
C.
布线问题只能用优先队列式分支限界法。
D.
布线问题采用相对位移表示搜索的上、下、左、右四个方向。
E.
布线问题采用“围墙”技巧表示搜索的边界。
F.
布线问题不需要设置约束条件和限界条件
【单选题】427,产品销售量达到顶峰并开始下降,利润稳中有降,是产品生命周期()阶段的特征。
A.
A,引入期
B.
成长期
C.
C,成熟期
D.
衰退期
【单选题】在共轭酸碱对中,酸的酸性越强,其共轭碱的()
A.
碱性越强
B.
碱性强弱不定
C.
碱性越弱
D.
碱性消失
【判断题】在共轭酸碱对中,酸的酸性越强,其共轭碱的碱性越弱
A.
正确
B.
错误
【单选题】产品销售达到顶峰并开始下降,利润稳中有降.是产品生命周期()阶段的特征。
A.
引入期
B.
成长期
C.
成熟期
D.
袞退期
【单选题】产品销售量达到顶峰并开始下降,利润稳中有降,是产品生命周期()阶段的特征。
A.
引入期
B.
成长期
C.
成熟期
D.
衰退期
【单选题】在共轭酸碱中,酸的酸性越强,其共轭碱的( )
A.
碱性越强
B.
B。碱性强弱不定
C.
碱性越弱
D.
D。碱性消失
【单选题】7 16. 为了保证 导线 点 精度 和 正确 性, ( )导线应 进行 左、右 角 观测。
A.
闭合
B.
附合
C.
D.
一级
【单选题】在共轭酸碱中,酸的酸性越强,其共轭碱的
A.
碱性越强
B.
碱性强弱不定
C.
碱性越弱
D.
碱性消失
【判断题】在共轭酸碱对中,若酸的酸性越强,则其共轭碱的碱性也越强;若碱的碱性越弱,则其共轭酸的酸性也越弱。
A.
正确
B.
错误
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