【单选题】女职工在在经期禁忌从事的高处作业为:分级标准中规定的第( )级、第( )级高处作业。
【简答题】二次打击假说(two hit hypothesis)
【单选题】The robots can locate colored balls by means of ______.
A.
a charge-coupled device
【单选题】If there are eight red balls, two white balls, pick two at random, what is the probability that we will get two balls with the same color (either 2 red balls or 2 white balls)?
【简答题】将1、2、3、…2004、2005作如下位置的排列(横向为行):那么2005应排第______行中的第______个数.
【简答题】回答第 127~130 题: 第 127 题 气雾剂中作抛射剂的是( )。