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【单选题】
现测定套管换热器的总传热系数。数据如下:甲苯在内管中流动,流量为 5000kg ·h -1 , 甲苯的比热容为 1.89kJ × kg -1 × K -1 ,进口温度为 80 °C,出口温度为 50 °C;隙中流动,进、出口温度分别为 15 °C和 30 °C。逆流流动,冷却面积为 2.5m 2 。求传热平均温度差和总传热系数A.
42.06 ， 749.02
B.
38.18 ， 825.06
C.
42.06 ， 825.06
D.
38.18 ， 749.02
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【单选题】An 18-year-old boy was suspected of having leukemia. It was decided to confirm the diagnosis by performing a bone marrow biopsy. The following statements concerning this procedure are correct except w...
A.
The biopsy was taken from the lower end of the tibi
B.
Red bone marrow specimens can be obtained from the sternum orthe iliac crests
C.
At birth, the marrow of all bones of the body is red and hematopoietic
D.
The blood-forming activity of bone marrow in many long bones gradually lessens with age, and the red marrow is gradually replaced by yellow marrow
E.
By the time the person becomes adult, red marrow is restricted to the bonesof the skull, the vertebral column, the thoracic cage, the girdle bones, and the head of the humerus and femur
【简答题】方法是一个独立的功能，那么（ ）是该功能的运算结果需要明确的。
【单选题】An 18-year-old boy was suspected of having leukemia. It was decided to confirm the diagnosis by performing a bone marrow biopsy. The following statementsconcerning this procedure are correct except wh...
A.
The biopsy was taken from the lower end of the tibi
B.
Red bone marrow specimens can be obtained from the sternum orthe iliac crests
C.
At birth, the marrow of all bones of the body is red and hematopoietic
D.
The blood-forming activity of bone marrow in many long bones gradually lessens with age, and the red marrow is gradually replaced by yellow marrow
【单选题】某法院法官赵某在审理一起共同犯罪案件中,因其弟是犯罪嫌疑人之一而退出审判活动。 这体现了诉讼法的 ( )。
A.
回避原则
B.
合议制原则
C.
公开审判原则
D.
两审终审原则
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