《国际危规》中的4.2类和6.2类分别称为()。A.自反应物质和感染性物质 B.易自

题型:单项选择题

问题:

《国际危规》中的4.2类和6.2类分别称为()。

A.自反应物质和感染性物质

B.易自燃物质和感染性物质

C.易燃固体和有毒物质

D.氧化物和有毒物质

考点:海上货物运输包装危险货物的分类及其特性包装危险货物的分类及其特性题库
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按要求改写句子。

1. She often does homework at home.(改为一般疑问句) 

    _______ she often _______ homework at home?

2. I bought some fruit this morning.(改为否定句)

    I _______ fruit this morning.

3. She never gets to school very early.(对画线部分提问)

     _______ does she get to school very early?

4. I was away from school for about a week.(同上)

    _______ you away from school?

5. I think a chicken can swim.(改为否定句)

    I _______ a chicken _______ swim.

6. Miss Wang likes her students.(改为一般疑问句)

    _______ Miss Wang _______ her students?

7. He can't hear anything.(改为同义句)

     He _______ hear _______.

8. The dog likes to follow people.(对画线部分提问)

     ________ does the dog like _______?

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相对安全

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通透系数(permeability coefficient)

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个体在头脑中把各种事物抽象出来的共同的本质特征结合并联系起来的思维过程是()

A.分析

B.综合

C.抽象

D.概括

题型:单项选择题

使用无公害农产品标志的单位和个人,应当建立无公害农产品标志的()制度,对无公害农产品标志的使用情况如实记录并存档。

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