实际流体一元恒定总流能量方程所取的两个断面要求是（）。 A.非_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

实际流体一元恒定总流能量方程所取的两个断面要求是（）。

A.非均匀过水断面

B.渐变流过水断面

C.渐变流横断面

D.均匀流横断面

答案

参考答案：B

改错题

短文改错
此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
如有错误(每行只有一个错误), 则按下列情况改正：
此行多一个词：把多余的词用斜线(\)划掉, 在该行下边横线上写出该词, 并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号(∧), 在该行下边横线上写出该加的词。
此行错一个词：在错的词下划一横线, 在该行下边横线上写出改正后的词。
注意：原行没有错的不要改。

For the final speaker here today,  I would like to
share you some of the conclusions of our research. We
wanted to know that the Internet would become the most
popular source of news for people. They have found that
although the Internet has become increasing popular,
the number of people which get news from the Internet
compares to the radio or television is still small. While the
Internet was a popular tool,  it is still not as easily accessible
as newspapers,  television and the radio is,  and due to
the amount of uncontrolled information on the Internet,
people do not always trust the news they find it online.

1. _____
2. _____
3. _____
4. _____
5. _____
6. _____
7. _____
8. _____
9. _____
10. _____

实验题

下图表示食物通过人体消化道时，淀粉、蛋白质、脂肪被消化的程度，字母表示消化道的各个器官，请据图回答：（7分）

（1）曲线甲是_______的消化，原因是该物质在口腔内初步消化成_______。所以咀嚼米饭时感到甜味。

（2）从曲线图中可知，食物都是在[ ]_______处最终消化成人体吸收的营养物质，这与其含有丰富的消化液有关，其中含有的消化液有_______、_______和_______。