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Longwall workers can be exposed to harmful respirable dust from generation sources.

提问人:网友Litlay 发布时间:2022-01-07
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更多“Longwall workers can be expose…”相关的问题
第1题
Longwall workers can be exposed to harmful respirable dust from only one dust generation sources.
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第2题
The practices can help control respirable dust levels in the longwall shear?
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第3题
The following practices can help control respirable dust levels in the longwall shield?

A、Canopy-mounted spray systems

B、Shield sprays on the underside of the canopy

C、Air dilution

D、Unidirectional cutting sequence

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第4题
The characteristics of Longwall Shield?

A、more powerful and faster/cutting speeds exceeding 100 fpm

B、shield movement can be a significant source of dust

C、coal and/or rock fall from the top of the shield canopy directly into the airstream

D、requires shields to advance at a faster rate

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第5题
As a general rule, the same types of supervision can be used for both warehouse workers and truck drivers.
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第6题
Longwall mining equipment and operational practices have improved dramatically since the early .
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第7题
In para. 10, “…failure to discipline and fire non-performers is one of the most demotivating actions an organization can take”. Here “discipline” means “to lay off workers”.
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第8题
From the passage it can be inferred that ______.A.all school children are offered a course

From the passage it can be inferred that ______.

A.all school children are offered a course in the use of computer

B.all unemployed workers are being retrained

C.in reality only a certain portion of unemployed workers will be retrained

D.retraining programmes are considered very important by the government

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第9题
From the passage we can find out that the author mainly studies ______.A.patterns of famil

From the passage we can find out that the author mainly studies ______.

A.patterns of family behavior

B.women who are initiating social change in a small region in Texas

C.migrant agricultural workers

D.how migrant farm workers lived in the past

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