按照数据化整的通用方法，化整间距为（）时的化整方法完全等同于

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问题单项选择题

按照数据化整的通用方法，化整间距为（）时的化整方法完全等同于数据修约规则。

A.1

B.2

C.5

D.3

答案

参考答案：A

阅读理解

NEW YORK PLUMBING(管道) & HEATING

Since 1968

Plumbing and Heating Fixing

LARGE OR SMALL

24 Hours 7 Days Service

Tel: 56568833

268 Pine Street 5^th Avenue

小题1:Which shows New York P & H (Plumber & Heating) has been in business for a long time?

A．“Since 1968”

B．“24 Hours 7 Days Service”

C．“56568822”

D．“268 Pine Street 5^th Avenue”小题2:For which of the following problems would one call New York P & H?

A．Rainwater drops from the roof.

B．A refrigerator stops working.

C．The floor of the bathroom is covered with water.

D．There’s something wrong with the furniture.小题3:Which of the following is NOT clear in the reading?

A．Where P & H is.

B．How big P & H is.

C．What P & H does.

D．When P & H was set up

单项选择题

块矿粒度要求小于6mm的少于（）。

A、10%

B、5%

C、20%