【判断题】测定烟尘浓度时必须采用等速采样法,这样做的好处是结果相对准确,而且采得的烟尘也比较接近于真实环境下的浓度,这样可以提高实验的真实性
【简答题】图示所示的焊接缺陷为(),其主要原因为焊料在焊接过程中发生了()。
【单选题】Which of the following activities can be used at the practice stage of teaching vocabulary?
A.
Filling the blanks of a text by using the new vocabulary.
B.
Explaining the use of the new vocabulary.
C.
Finding out the meaning of the new vocabulary according to the context.
D.
Finding out the part of speech of the new vocabulary.
【单选题】Traditionally, universities have carried out two main activities: research and teaching. Any experts would argue that both these activities play a critical role in serving the community. The fundament...
A.
believes traditional universities have done a good job serving the community
B.
believes it remains to be discussed how universities should meet the needs of society
C.
thinks some experts require too much of universities
D.
thinks universities should do more than just research and teach
【单选题】在ASCII码表中可以看到每个小写字母的ASCII码值比它相应的大写字母的ASCII码值_____。
【判断题】应收账款管理的目的是在应收账款信用政策所增加的销售盈利和这种政策成本之间作出权衡,只有当应收账款所增加的成本超过所增加的销售盈利时,才宜实施赊销政策。( )
【单选题】急性化脓性腹膜炎的手术指征中,不正确的是()