任务型阅读

Tom and Mike were good friends. Sometimes they were kind to each other, sometimes they were not. But some of their classmates said they were like brothers. One day they went out for a walk together, At noon they were very hungry and they went into a restaurant to have lunch. The waiter came up to them and asked, “What can I do for you?” “Please bring us two apples first.” said Tom .

When the waiter put two apples on the table; Mike took the bigger one at once. Tom got angry. “You are impolite(没礼貌)”.Why didn’t you take the smaller one?” Tom said.  “But I was right,” said Mike with a smile. “If I let you take first, which one will you choose?” “Of course I will take the smaller one.” said Tom. “Yes,” Mike said, “If you take the smaller one, the bigger one will be mine. Don’t you think so? ”  “Oh.” Tom couldn’t answer.

小题1:Tom and Mike were ________.

小题2:They went into a restaurant to __________.

小题3:The waiter brought them _______ before the meal.

小题4:Mike took__________ apple.

小题5:At last ________ had the smaller apple.

简述管道中液体流动时能量损失的原因与形成，沿程阻力损失的影响因素有哪些？