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  2. Warriner's English Grammar and Composition - Wikipedia

    en.wikipedia.org/wiki/Warriner's_English_Grammar...

    Warriner's English Grammar and Composition is a series of textbooks on English grammar and composition by John E. Warriner, consisting initially of six books targeted at grades 6 through 12, in numerous editions, with publication beginning in 1946 and a 7th book added in 1959. [1]

  3. Water quality - Wikipedia

    en.wikipedia.org/wiki/Water_quality

    The International Organization for Standardization (ISO) published [when?] regulation of water quality in the section of ICS 13.060, [57] ranging from water sampling, drinking water, industrial class water, sewage, and examination of water for chemical, physical or biological properties. ICS 91.140.60 covers the standards of water supply systems.

  4. Seven basic tools of quality - Wikipedia

    en.wikipedia.org/wiki/Seven_Basic_Tools_of_Quality

    The seven basic tools of quality are a fixed set of visual exercises identified as being most helpful in troubleshooting issues related to quality. [1] They are called basic because they are suitable for people with little formal training in statistics and because they can be used to solve the vast majority of quality-related issues.

  5. Drinking water quality in the United States - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality_in...

    Drinking water quality in the U.S. is regulated by state and federal laws and codes, which set maximum contaminant levels (MCLs) and Treatment Technique requirements for some pollutants and naturally occurring constituents, determine various operational requirements, require public notification for violation of standards, provide guidance to ...

  6. Quality control - Wikipedia

    en.wikipedia.org/wiki/Quality_control

    Quality inspector in a Volkseigener Betrieb sewing machine parts factory in Dresden, East Germany, 1977. Quality control (QC) is a process by which entities review the quality of all factors involved in production. ISO 9000 defines quality control as "a part of quality management focused on fulfilling quality requirements". [1]

  7. Secondary education in the United States - Wikipedia

    en.wikipedia.org/wiki/Secondary_education_in_the...

    Grades in American schools range from A (90% to 100%) to F (59% and below), excluding E. To pass a class and receive a credit for it, students usually need to receive a grade between A to D, or 100% to 60%. F, or 59% and below would be failing and students wouldn't receive credit for the class.

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