将 sh(x+y) 中的 y 用 -y 代替，得 sh(x-y)=\frac{e^{x-y} - e^{-(x-y)}}{2} ch(x+y)=chxchy+shxshy \\ = \frac{e^{x} + e^{-x}}{2} \cdot \frac{e^{y} + e^{-y}}{2} + \frac{e^{x} - e^{-x}}{2} \cdot \frac{e^{y} - e^{-y}}{2} \\ = \frac{(e^{x} + e^{-x})(e^{y} + e^{-y})}{4} + \frac{(e^{x} - e^{-x})(e^{y} - e^{-y})}{4} \\ = \frac{e^{x+y} +e^{x-y} + e ...

In these lessons, we will learn the phonic sounds: ch, sh, th, wh and ph. The digraphs CH, SH, TH, WH, and PH are essential parts of English phonics.

sh or ch? Quiz. Can't find it? Just make your own! Wordwall makes it quick and easy to create your perfect teaching resource.

Learn about the digraphs: sh, th, ch, ph and wh. Digraphs is a fun song which explains...

This is a fun, consonant digraphs compilation phonics song for learners of English.A colorful, animated music video to learn how to pronounce the digraphs Th...

2013年10月16日 · sh，ch，th是反双曲函数，shx=1/2（e^x-e^(-x)），chx=1/2（e^x+e^(-x)），thx=shx/chx。 反双曲函数是双曲函数的反函数。记为（arsinh、arcosh、artanh等等）。与反三角函数不同之处是它的前缀是ar意即area(面积)，而不是arc(弧)。

Phonics digraphs are an essential part of early literacy education in elementary schools, helping young readers understand how certain letter pairs create unique sounds. A digraph is a combination of two letters that come together to make a …

2022年4月7日 · Here are 8 comprehensive lists of words with consonant digraphs, including examples with digraphs SH, TH, CH, WH, CK, and PH. These FREE printable pdfs are arranged by digraph in easy-to-read and organized lists for a variety of uses!

2024年8月21日 · 辅音组合ch发 /tʃ/的音。 例：chicken（鸡）, chain（链子）, checkers（跳棋）, chair（椅子）, chalk（粉笔）， chest（胸部）, child（孩子）, chili（辣椒）, church（教堂）, chese（奶酪）, cherry（樱桃）, cheek（脸颊）…… chain（链子），chair（椅子），checkers（跳棋），chicken（鸡），cherry（樱桃）. Here is a chair. Is a chair here? Here is a chain. Is a chain here? Here is a chicken. Is a chicken here? Here is a cherry.

2023年4月25日 · Examples of consonant digraphs are sh, ch, wh, and th. The digraphs sh, ch, and th represent unique sounds that are not usually associated with any individual letters of the alphabet. When the /s/ sound combines with the /h/ sound, they create the unique sound of /sh/.