Which of the following statements is correct concerning heat

题目
单选题
Which of the following statements is correct concerning heat transfer?()
A

Heat is given off from a high temperature region known as a heat sink

B

Heat transfer rate is affected most by the size of the heat sink involved

C

Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink

D

Heat transfer by radiation will occur only by mass motion of a fluid substance

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相似问题和答案

第1题:

Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?

A.Control the amount of lube oil burned in the combustion chamber

B.Transmit heat from the piston to the cylinder liner

C.Prevent damage to ring groove inserts by acting as a heat dam

D.Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案:B

第2题:

Which of the following statements about ORACLE is (are) correct?

Ⅰ.ORACLE follows SQL standard

Ⅱ.ORACLE database defines two logical types: table and view

A.Ⅰonly

B.Ⅱ only

C.Ⅰ and Ⅱ

D.none of the above


正确答案:C

第3题:

15 Which of the following statements about intangible assets are correct?

1 If certain criteria are met, research expenditure must be recognised as an intangible asset.

2 Goodwill may not be revalued upwards.

3 Internally generated goodwill should not be capitalised.

A 2 and 3 only

B 1 and 3 only

C 1 and 2 only

D All three statements are correct


正确答案:A

第4题:

多选题
Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
A

c=d

B

l and k are parallel

C

m and l are perpendicular


正确答案: C,B
解析:
根据题目中的已知信息无法推断出各直线的关系,因此B、C均不正确;而由图示可知,c和d分别是a和b的补角,由于a=b,所以c=d,A项正确。

第5题:

Which of the following statements concerning intellectual property is wrong?()

  • A、Intellectual property is an intangible creation
  • B、Intellectual property in ludes patents,trademarks,copyrights,etc.
  • C、Intellectual property is a visible creation
  • D、There are some agreement sconcerning intellectual property under the WTO

正确答案:C

第6题:

Which of the following statements about the warm-blooded mammals is true according to the text?

A. They can change their environments.

B. They can adjust body heat to keep their ideal temperature.

C. They can make food from chemicals.

D. They get most of their heat from the environment.


正确答案:B
[解析] 见最后一段,第三、四行。

第7题:

In HDLC Protocol, when Supervisory Frame's type code is '00'.About the following statements, which is correct.

A.Receive Ready

B.Receive not Ready

C.Reject

D.Selective Reject


正确答案:A

第8题:

19 Which of the following statements about intangible assets in company financial statements are correct according

to international accounting standards?

1 Internally generated goodwill should not be capitalised.

2 Purchased goodwill should normally be amortised through the income statement.

3 Development expenditure must be capitalised if certain conditions are met.

A 1 and 3 only

B 1 and 2 only

C 2 and 3 only

D All three statements are correct


正确答案:A

第9题:

单选题
Which of the following statements concerning energy is correct?()
A

Energy can be created or destroyed

B

Energy may not be transformed

C

The total quantity of energy in the universe is always the same

D

None of the above


正确答案: D
解析: 暂无解析

第10题:

单选题
Which of the following statements concerning cargo is correct?()
A

Cargoes are any type of goods transported by any type of ships

B

Cargoes are goods transported in bulk

C

Cargoes usually include goods transported in bulk and in containers

D

Cargoes are usually packaged in containers


正确答案: D
解析: 暂无解析

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