试题与答案

烟花爆竹生产企业应当依法进行( )。 A.影响评价 B.综合评价 C.安全评价

题型:单项选择题

题目:

烟花爆竹生产企业应当依法进行( )。

A.影响评价
B.综合评价
C.安全评价
D.环境评价

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:B块所受水平面对它的摩擦力为动摩擦力,大小为fB=μ(mA+mB)g,方向水平向左,受到A块对它的摩擦力为静摩擦力,方向向左;A所受B块对它的摩擦力为静摩擦力,方向水平向右。显然,在荷载F作刚下...

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阅读理解。

     根据短文内容,选择正确答案。

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