题干

实数9的算术平方根是(   )

A:3

B:﹣3

C:±3

D:81

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A

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Zero Waste Awards

    Who should enter?

    Entries(参赛作品) are welcomed from anyone who processes waste. While we expect

    most entries to come from the UK, we welcome international entries, too. Entrants have been split into the following groups: private sector, public sector, community sector and partnerships.

    What are the categories?

    There're five categories which are based on the Waste Hierarchy(层级). We appreciate that companies will have different strengths within those categories as they work towards Zero Waste. The broad categories are: waste prevention, re-use, recycle/recover, energy recovery, general.

    How do I enter?

    Submitting an entry is really easy! Just follow these few simple steps:

    1) Carefully read through the category information;

    ). Write your entry--it should be a maximum of 1,500 words and a word document;

    3) Arrange your supporting material into a single document--maximum six pages long;

    4) Complete the simple online entry form.

    Important dates

    While entries are welcomed all year round, these are key dates—this is to give the judges plenty of time to read through all the entries! These are listed in entry deadlines column below. Don't worry if you have just missed one of the entry deadlines, your submission will be automatically entered into the next session.

Entry deadlines

Judging dates

Awards presentation dates

1st March

12th March

4th April

1st June

12th June

4th July

1st Sept.

12th Sept.

4th Oct.

1st Dec.

12th Dec.

4th Jan.

    You can submit a maximum of two entries per year—six months apart.

    Awards

    We understand that working towards Zero Waste is an ongoing journey and as such the

    Zero Waste Awards scheme offers organizations a structure to celebrate their progress along the way. The four awards are: Gold (76-100), Silver (51-75), Bronze (26-50), Highly Commended(0-25).