假若你要去东南亚国家旅游,既要领略热带雨林气候又要领略热带季风气候,你要去的国家

题型:选择题

问题:

假若你要去东南亚国家旅游,既要领略热带雨林气候又要领略热带季风气候,你要去的国家是[ ]

A.菲律宾

B.马来西亚  

C.印尼  

D.缅甸

考点:东南亚
题型:选择题
What’s the difference(区别) between studies and life in primary schools and middle schools? Here, two students give you        ideas.
Wang Junli, 14, Chongqing
In the primary school, I walked to school every day because it is not far        my home. But in the middle school, I should live at school because our school tells us to do so. After two        middle school life, I learn a lot. That is, you need to learn to        yourself(你自己) and learn to do things by yourself.
Huang Lu, 14, Chengdu
My name is Huang Lu. I had(有) only 4 subjects        they were very easy to learn in the primary school. When I        to the middle school, I find that there are more subjects        history and geography. They are        to learn so I don’t know how to learn them well. Every day I        to be interested in all subjects. Listen to the teachers and take notes carefully. They are my       .
小题1:
A.our B.theirC.yourD.my
小题2:
A.nearB.inC.atD.from
小题3:
A.years’B.yearsC.weeks’D.weeks
小题4:
A.look outB.look atC.look afterD.look for
小题5:
A.because B.butC.soD.and
小题6:
A.amB.comeC.want D.hope
小题7:
A.like B.likesC.is likeD.are like
小题8:
A.easyB.funC.difficultD.bad
小题9:
A.haveB.tryC.dislikeD.ask
小题10:
A.notesB.subjectsC.schoolsD.ideas
题型:选择题

如果被保险人在保险期限内遭受意外伤害,且在责任结束时治疗仍未结束,则应以()确定被保险人的组织残缺或器官正常机能的丧失是否是永久性的。

A.治疗结束

B.责任期限结束这一时点

C.送至医院时

D.事故发生时

题型:选择题

CO2气体保护焊,形成氢气孔的可能性较小。( )

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从海水中提取镁是世界各国获得镁的主要来源,以下是制取镁的过程中涉及的几种物质的溶度积,根据你所学的知识回答下列几个问题:

物质CaCO3MgCO3Ca(OH)2Mg(OH)2
溶度积2.8×10-96.8×10-65.5×10-61.8×10-11
(1)在从海水中提取镁时,往往用到贝壳(主要成份是碳酸钙),你认为______(填“能”或“不能”)将贝壳研磨成粉末直接投入海水中,理由是______;如果不能直接投入,应将贝壳作何处理,试写出化学方程式______.

(2)某同学在实验室条件下模拟该生产过程,但实验室无石灰,他打算用烧碱代替,你认为______

______(填“可以”或“不可以”)得到Mg(OH)2.在加试剂时,误将纯碱溶液加入海水中,他思考了一下,又在得到的混合体系中加入过量的烧碱溶液,你觉得他______(填“能”或“不能”)将Mg2+转化为Mg(OH)2沉淀,理由是______.(用离子方程式表示)

(3)已知海水中镁离子浓度为1.8×10-3mol/L,则要使镁离子产生沉淀,溶液的PH最低应为______.

题型:选择题

在《全国旅游标准化试点地区评估表》中,对国家标准和行业标准实施考察的基础标准主要有哪几项?

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