图示等直杆AC，杆长为4a，材料的抗拉刚度为EA，受力如图，则杆B截面的水平位移为： 。<img src="http://p.ananas.chaoxing.com/star3/origin/9d027834bb41632541d4482c401bf4a4.png" /> A: <img data="%7B%22formula%22%3A%22%5C%5Cfrac%7B4Fa%7D%7BEA%7D%22%2C%22id%22%3A183317%7D" src="https://mooc1-1.chaoxing.com/ananas/latex/p/183317" /> B: 0 C: <img data="%7B%22formula%22%3A%22%5C%5Cfrac%7BFa%7D%7BEA%7D%22%2C%22id%22%3A173376%7D" src="https://mooc1-1.chaoxing.com/ananas/latex/p/173376" /> D: <img data="%7B%22formula%22%3A%22%5C%5Cfrac%7B3Fa%7D%7BEA%7D%22%2C%22id%22%3A398230%7D" src="https://mooc1-1.chaoxing.com/ananas/latex/p/398230" />

formula [5fC:mjulE]

杜邦公式 (Dupont Formula)：ROE = （ ）

1-02. This formula is used to __________ the area of a circle.

Which word is inappropriate in the following sentence? A: “formula”, or an “expression” was not necessarily an “equation”; the latter involves an equality. B: formula C: was D: necessarily E: latter

There is a universial official formula to decide the tiers of the cities.

It will be left as an exercise for the reader to prove this formula(公式).

The company has ( ) a new formula for setting the dispute.

You may use the formula to ________ the volume of the container.

Simpson's formula is also known as the parabola formula.