题目内容

依法设立的危险化学品生产企业,必须向国务院质检部门申请领取危险化学品()。

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生产厂房内外工作场所的井、坑、孔、洞或沟道,应覆以与地面齐平的坚固的盖板。

A. 正确
B. 错误

试述刮板输送机的工作原理。

When a deck cargo is secured with chain or wire lashings and grab (pear) links,which statement is FALSE?()

A. The amount of take-up is limited by the length of the turnbuckle
B. At the grab (pear) link,the slack end of chain should be led back and secured to the chain above the link
C. The lashings should be inspected each day and any slack taken up
D. The turnbuckle should be secured with a stick or lock nut

叶漏水量较大的机组,导叶全关后,机组转速很难达到25%ne,则制动转速应适当()。

A. 提高;
B. 降低;
C. 不变;
D. 可提高也可降低;

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