题目内容

泊肃叶定律表明：流体的秒流量与流体的（）成反比，与（）成正比，与管道半径R的（）成正比。

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Task 4 Listen to the second part of the passage and rearrange the order of the sentences below according to what you hear.[音频]1. He canceled the planned flight to Vienna and came back to wait for the owner.2. The artist found the lottery ticket in his hat.3. He was so happy that he threw the lottery ticket into the violinist's hat with 50 dollars accidentally.4. He refused to do so at the cost of losing honesty.5. George Sang bought a lottery ticket and won a prize of $500,000.6. Someone asked the young artist to take the lottery____→→_→_→→____

从3种产品中每次取2个，且同种产品可以重复取，不同的取法共有（）种.

有红、绿、黄三种颜色的卡片，从这些卡片种选取5张，且要求每种颜色都有，问有多少种不同的选法？

在一个单链表中，若p结点不是最后的结点，在p之后插入s结点，则执行

A. s->next = p; p-next = s;
B. s->next = p-next; p-next = s;
C. s->next = p-next; p = s;
D. p->next = s; s-next = p;