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- Firstly I design a equipment to acquire the iffy signal which is made up of by everlasting magnetic iron,hall element and amplifier.Then I have study the signal"s filter and sample. 首先研究了由永磁铁、霍尔元件和放大电路组成的探头，并在探头提取出裂纹信号的基础上，研究了信号的滤波和采样；
- Q16：What is the shelf life of 3M's filtering facepiece respirators? 问16：3M随弃式呼吸防护口罩的存放期是多长时间？
- In a fortnight the House witt be sitting. 两个星期后议院就要开会了。
- They spend the winter(s) in a warmer climate. 他们在气候较暖的地方过冬。
- Most plural nouns in English end in "s". 英语的复数名词多以“s”结尾。
- The sweater had shrunk after repeated washing(s). 这件套头毛衣洗过多次已缩水了。
- Some old folk(s) have peculiar tastes. 有些老人有特殊的爱好。
- Answer the following question(s). 回答下列问题。
- Most plural nouns in English end in s'. 英语的复数名词多以s结尾。
- The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
- Diane Witt has not cut her hair for twelve years. 黛安娜?威特已有12年没剪头发了。
- Kalman' s filtering estimation method 卡尔曼滤波法
- Mr.Evans : Good morning, Miss Witt. 埃文斯先生：早上好，小姐亚威特。
- Here are the designs. Which one(s) do you prefer? 这就是那些图样.;你喜欢哪一个[些]?
- Which journal(s) do you subscribe to? 你订阅哪一种杂志?
- The novel had an enormous vogue in the 1930's. 这本小说在三十年代曾广为流传。
- He earned four A's in the final examinations. 他期末考试四门功课得优。
- The Beatles were the pop idols of the 60's. 披头士乐队是六十年代人们崇拜的偶像。
- He returned to the fold at his 80's. 他在八十高龄又恢复原来的宗教信仰。
- Mr. De Witt was the first to recover the power of speech. 最先恢复说话本能的是德韦特先生。
