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一矩形保温柜的外保温层是双壁为镀银的夹层结构,夹层空隙很小。外壁内表面温度为-10℃,内壁外表面温度tw2为90℃,镀银壁面的发射率为ε1=ε2=0.02。试计算: (1)系统黑度; (2)单位面积容器壁辐射换热的散热量。
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司法工作人员收受贿赂后徇私枉法的,以受贿罪和徇私枉法罪数罪并罚。()
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对零件进行标识和描述的编码采用()。
A.数字+字母
B.数字+数字
C.字母+字母
D.中文+外文
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Section ADirections: This section is to test your ability to give proper answers to questi
Section ADirections: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.听力原文:I'm tired because I went to bed late last night.(1)A.So do I.B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.听力原文:I'm tired because I went to bed late last night.(1)A.So do I.B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
听力原文:I'm tired because I went to bed late last night.(1)A.So do I.B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
(1)A.So do I.B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
A.So do I.B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
B.Go to bed earlier tonight.C.It doesn't matter.D.What a pity!
C.It doesn't matter.D.What a pity!
D.What a pity!
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普通教育学所研究的课程是指()的课程。
A.某一学科
B.狭义的课程
C.广义的课程
D.学生在校学习的内容
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7个月婴儿,高热3天一般情况可,给予感冒灵口服,次日退热,皮肤可见较多红色斑丘疹()
A . 麻疹
B . 风疹
C . 幼儿急疹
D . 猩红热
E . 肠道病毒感染
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______ is the capital of Scotland since the 15(th上标) century.
A.Manchester
B.Edinburgh
C.Liverpool
D.Cardiff
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生产过程中发生的生产费用,凡是因生产多种产品而共同发生的生产费用,应当按照一定标准在这些产品之间加以分配。
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胆汁淤积性黄疽常见于下列疾病,但除外
A.钩端螺旋体病
B.妊娠期复发性黄疸
C.华支睾吸虫病
D.胆总管结石
E.药物性肝病(氯丙嗪引起)
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笋干的品种很多,一般福建、浙江所产的笋干为()
A.白笋干
B.烟笋干
C.乌笋干
D.黑笋干
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1998年,父亲的年龄是兄弟两人年龄之和的2倍,是兄弟两人年龄之差的7倍,父子三人年龄之和是84岁。那么,2010年父亲与哥哥的年龄分别是多少岁( )
A.父亲68岁,哥哥22岁
B.父亲56岁,哥哥18岁
C.父亲68岁,哥哥30岁
D.父亲56岁,哥哥10岁
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新石器时代龙山文化的代表性遗址是位于( )的“城子崖”。
A.浙江余姚 B.云南元谋 C.山东章丘 D.山西西安
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分部分项工程量清单的项目编码“010102003001”中,“02”表示()顺序码。
A.专业工程
B.工程分类
C.分部工程
D.分项工程
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()组织召开设计联络会。填写设计联络会管控记录表。
A.施工项目部
B.业主项目部
C.监理项目部
D.建设单位
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1828年维勒合成尿素时,他用的是( )。 A.碳酸铵 B.乙酸铵 C.氰酸铵 D.草酸铵
A.碳酸铵
B.乙酸铵
C.氰酸铵
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