扑救( )火灾时,比水轻又不溶于水的液体用直流水、雾状水灭火往往无效,可用普通蛋白

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问题:

扑救( )火灾时,比水轻又不溶于水的液体用直流水、雾状水灭火往往无效,可用普通蛋白泡沫或轻泡沫扑救。

A.易燃液体

B.毒害和腐蚀品

C.易燃固体

D.气体类

考点:安全工程师安全生产技术安全生产技术
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下列不是第一恒磨牙正常萌出的影响因素的是()

A.第一恒磨牙的位置

B.下颌骨的大小

C.第二恒磨牙的方向

D.第二乳磨牙的末端平面

E.第二乳磨牙严重龋坏

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下列哪一项不是防护罩所要实现的功能.()

A.使人体不能进入危险区

B.阻挡高速飞向人体的外来物

C.使设备安装牢固

D.ABC都不是

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粗加工时应选较()的前角。

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定时限过流保护的特点是什么?

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When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user (115) . In practice, the two media are normally audio and video, this is, (116) plus moving (117) .
It should be’ obvious by now that transmitting multimedia material in uncompressed form is completely out of (118) . The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission (119) .

A.impossible

B.fearful

C.feasible

D.program

E.question

F.ting

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