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为了比较沙子容热本领的大小,小明做了如下图所示的实验:在2个相同的烧杯中分别装有质量、都相同的沙子,用两个相同的酒精灯对其加热,实验数据记录如下: 质量/g 升高10℃所需要时间/s 升高20℃所需时间/s 升高30℃所需时间/s 沙子 30 64 89 124 水 30 96 163 220 (1)在此实验中采用了转换法的思想,用加热时间的长短来表示物质______,请再列举一个类似思想的实验:______(请仿造上面的句式填). (2)分析上表中的实验数据可知;质量相同的沙子,升高相同的温度时,水吸收的热量______(大于/小于)沙子吸收的热量. (3)如果加热相同的时间,质量相同的沙子,______ (沙子/水)升高的温度更高,所以白天在海边会吹______(海风/). (4)有一次小明在白天进入森林游玩了路,经过思考,他______(顺风/逆风) 走了下去,终于走出了森林.
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举一反三
【单选题】企业为了正确划分并确定各个会计期间的财务成果,其采用的记账基础是( )。
A.
收付实现制
B.
权责发生制
C.
永续盘存制
D.
实地盘存制
【单选题】导致原发性下肢静脉曲张的主要病因是
A.
原发性深静脉瓣膜关闭不全
B.
深静脉血栓形成
C.
动静脉瘘
D.
下肢运动减少
E.
静脉壁软弱、静脉瓣膜缺陷以及浅静脉内压力持续升高
【单选题】企业为了正确划分并确定各个会计期间的财务成果,应采取( )记账基础。
A.
收付实现制
B.
权责发生制
C.
明晰性原则
D.
收入费用配比原则
【单选题】带“回”字符号标志的手持电动工具是( )工具。
A.
I类
B.
Ⅱ类
C.
Ⅲ类
D.
以上都不正确
【单选题】企业为了正确划分并确定各个会计期间的财务成果所采用的记帐基础是( )。
A.
收付实现制
B.
永续盘存制
C.
权责发生制
D.
实地盘存制
【单选题】旅游企业为了正确划分并确定各个会计期间的财务成果,应采用(    )记账基础。
A.
收付实现制  
B.
权责发生制    
C.
明晰性原则    
D.
配比原则
【单选题】A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?
A.
It is the greatest in the turn with the greatest radius.
B.
It is the greatest in the turn with the smallest radius.
C.
The acceleration is zero everywhere because of the constant speed.
D.
More information is needed to determine the answer.
E.
None of the others
【单选题】The Security Council has the greatest power in the UN. The main function of it is to maintain international peace and restore peace when conflicts arise. Its decisions are binding on all UN members. T...
A.
is most powerful in the world
B.
is responsible for keeping peace in the world
C.
is under the control of the United States
D.
is a branch of US Congress
【单选题】Middle (functional) managers have the greatest influence in the direction of the project in which type of organizational structure?
A.
Project.
B.
Strong matrix.
C.
Weak matrix.
D.
Project coordinator.
E.
Project expeditor.
【单选题】The human species came into being at the time of the greatest biological diversity in the history of the Earth. Today, as human populations expand and alter the natural environment, they are reducing ...
A.
The reduction in biodiversity represents a setback both for science and for society as a whole.
B.
The material and cultural wealth Of a nation are insignificant when compared with the country's biological wealth.
C.
The human species is in the process of initiating an unprecedented massive extinction episode.
D.
The current decline in species diversity has potentially grave consequences for the human species.
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