(三) 危险化学品安全技术下列对于盲板的制作要求,表述不正确的是( )。 A.盲板

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问题:

(三) 危险化学品安全技术


下列对于盲板的制作要求,表述不正确的是( )。

A.盲板的尺寸应符合阀门或管道的口径

B.盲板的厚度需通过计算确定,原则上盲板厚度不得高于管壁厚度

C.盲板及垫片的材质,要根据介质特性、温度、压力选定

D.盲板应有大的突耳并涂上特别颜色,用于挂牌编号和识别

考点:安全工程师安全生产技术安全生产技术
题型:单项选择题

Lucy has a dog. Dad gives the dog to her as a birthday present. She likes it very much. The dog is only five months old now. It is very cute and beautiful. Its color is white and its eyes are brown. This little dog looks like a small ball, so Lucy gives it a name "Snow Ball". It is very lovely. People all want to put it in their hands when (当……时) they see it. It almost eats everything, but chicken is its favorite food.

Snow Ball likes playing with Lucy very much. So Lucy often plays with it after school. They are best friends.

小题1:Who is Lucy’s best friend?

A.A pig.

B.A mouse.

C.A dog.

D.A cat.小题2:Who gives this pet to her as a present?

A.Her mom.

B.Her dad.

C.Her brother.

D.Her sister.小题3:What food does the pet like best?

A.Chicken

B.Cakes.

C.Hamburgers.

D.Milk小题4:When does Lucy play with it?

A.On Sunday.

B.After school.

C.In the morning.

D.Before class.

题型:单项选择题

公安信息的复杂性主要表现在哪?

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阿特休尔的媒介三种体系不包括()

A.西方媒介体系

B.东方媒介体系

C.南方媒介体系

D.北方媒介体系

题型:单项选择题

海运提单具有物权凭证的作用,而铁路运单和航空运单也具有该作用。

题型:单项选择题

看食品的色泽,不要被所()食品迷惑。

A、外包装漂亮的

B、外观过于鲜艳、好看的

C、造型漂亮的

D、香味异常的

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