一般指电阻率大于()Ωmm2/m的物体称为绝缘体。A.107 B.108 C.109

题型:单项选择题

问题:

一般指电阻率大于()Ωmm2/m的物体称为绝缘体。

A.107

B.108

C.109

考点:起重机操作证考试起重机司机考试起重机司机考试题库
题型:单项选择题

根据短文内容和所给中文提示,在空白处填入单词,每空限填一词。

     Melbourne is in Australia. It is a beautiful city with huge gardens, great 1________(公园) and many

amazing buildings. Many people come to 2________(参观) it every year.

     Melbourne is also an 3________(古老的) city in Australia. It has an interesting 4________(历史) of

more than 170 years. The first people came in 1835, and in the 1850s, gold was discovered. Because of this,

Melbourne became a very 5________ (富裕的) city. Many new buildings were 6________(建造) at that time.

     And 7________ (今天), Melbourne is one of the world's greatest cities. It is known for its beauty and its

famous universities. It is also Australia's top city for sports. Many of them are very 8________(流行的). For

example, young people are mad about 9________(足球) here. In 1956, the Olympic Games came to the city,

and for the first time they were showed live on TV around the world.

     Melbourne is a nice 10________(地方) and you can always have great fun here.

题型:单项选择题

下列各组物质中,含原子数最多的是(  )

A.0.4molO2

B.4℃时5.4mL水

C.10gNe

D.6.02×1022个硫酸分子

题型:单项选择题

锥度切割能准吗?

题型:单项选择题

常用散剂制备的混合机理是

A.扩散混合

B.搅拌混合

C.过筛混合

D.研磨混合

E.对流混合

题型:单项选择题

审计部门对会计师事务所出具的审计报告进行监督。( )

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