【判断题】焦糊食物中的苯并芘要比普通食物增加10到20倍。苯并芘是一种致癌物质。
【简答题】When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is de...
【单选题】某燃气企业在进行职业病危害专项检查时,对检查出的职业病危害因素进行了分类下列按照职业病危害因素来源进行分类的说法中,正确的是( )。
A.
客服大厅的工作台与座椅高度不匹配,属于劳动过程中产生的有害因素
B.
燃气管线的巡线人员网格点分配过多,属于生产过程中产生的有害因素
C.
燃气管线的巡线人员夏天容易中署,属于劳动过程中产生的有害因素
D.
加气站的维修工长期工作在噪声条件下,属于生产环墳中的有害因素
【单选题】在( )的情况下“或”运算的结果是逻辑0。
【单选题】在( )的情况下,逻辑运算“或非”的结果是逻辑“1”
【简答题】选择以下单词,填入下面短文中 invent, doubt, mention, nearly, website, all of sudden It is often difficult to decide on the inventor of certain inventions. This is because sometimes a few people may ______ thin...
【简答题】When I arrived at the Banner 1 ______________ I was so impressed by the fact that they came to me. I didn’t really want to 2. ______________. They came up to me and said, “Well, is there something we ...
【判断题】Manufacturers use standards so they can market their products to a wider audience than if they came up with separate – and perhaps incompatible – specifications.