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【简答题】
均质流体各点的密度相同,单位体积流体的质量称为流体的________,用ρ表示(kg/m3)
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【判断题】杨氏 弹性模量 是固体材料的一个重要物理参数 , 它标志着材料对于拉伸或压缩形变的抵抗能力。
A.
正确
B.
错误
【多选题】肺泡回缩力主要来自于
A.
肺的弹性阻力
B.
胸膜腔内压
C.
肺内压
D.
肺泡内液体层的表面张力
【简答题】Sharon Suarez has been looking forward to the day when she won't have to carry groceries(食品杂货)from her car to her house. That day has come. A growing number of people are shopping on the Internet. “I'...
【简答题】弹性模量是 的一个标志。
【简答题】Sharon Suarez has been looking forward to the day when she won't have to carry groceries(食品杂货) from her car to her house. That day has come. A growing number of people are shopping on the Internet. "I...
【简答题】阅读理解。 Look! What a nice car it is! I don't think that is an English car. It's a Japanese car. Its number is 86302. It's Mrs. Green's car, I guess. Yes, She is coming this way. (朝这边来了) Mrs. Green is my...
【单选题】肺的回缩力主要来自于:
A.
肺泡表面张力
B.
肺的弹性回缩力
C.
表面活性物质
D.
呼吸肌的收缩力
E.
胸膜腔内压
【简答题】Ben is an assistant at Sam's Auto Repair. A customer, Mary Adams, called Sam at 3:15 P.M., but Sam wasn't in. Then Mary asked Ben to tell Sam that she could get her car at 4 P.M., but she asked Sam to...
【单选题】肺的弹性阻力主要来自于
A.
肺泡的弹性纤维
B.
肺泡膜的液体分子层表面张力
C.
胸内负压
D.
胸廓弹性回缩
E.
肺泡表面活性物质
【简答题】弹性模量E是一个只依赖于材料基本成份的参量,是 的一个标志,在工程中表征材料对 的抗力,即材料的 。
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