To the formulas for the circle(圆) correspond the following formulas for the hyperbola(双曲线).

The more students understand the concept...t on these formulas.

We need to facts and formulas for studying mathematics.

The more students understand the concepts of geometry, the easier it is for __________ to appreciate the scientific achievements built on these formulas.

From this triangle, we can get some formulas of different love.

14.The structure of a song is the framework the song is built on. One of the most popular and well used formulas is the___________.

Which of the following is NOT a basic element of business letters?（ ） A: rigorous words B: the stress on specifications C: explicit tones D: the use of formulas

Which of the following statements about the abstract of a paper is right? ( ) A: In order to summarize the content of the paper in detail, the abstract can be written as long as possible. B: The abstract of a scientific work and the abstract of a humanities paper have the same components. C: An abstract is a summary of the major ideas contained in the research paper. D: Charts, formulas, chemical structural formulas can be used in the abstract.

All of the following are employee benefits except __________. A: commissions B: dental insurance C: paid vacation D: using a set of sophisticated formulas provided by cost accountants

30 years ago, my grandparents never imagined that they would be able to move into a two-store house decorated with modern _________. A: faculties B: formulas C: formats D: facilities