【单选题】The description of the first paragraph is to______.
A.
prove the importance of food
B.
introduce the discussion of food
C.
introduce the topic of street dining
D.
show the busy scene of London life
【多选题】一个逻辑函数以最大项之积表示的形式是唯一的,下面对最大项性质的描述正确的( ).( 1 分)
A.
对于任一个最大项,只有对应一组变量取值,才能使其值为0,其余情况均为1。
D.
具有相邻性的两个最大项之积可以合并成一个或项,并消去一对因子。
【多选题】一个逻辑函数以最大项之积表示的形式是唯一的,下面对最大项性质的描述正确的().
A.
对于任一个最大项,只有对应一组变量取值,才能使其值为0,其余情况均为1。
D.
具有相邻性的两个最大项之积可以合并成一个或项,并消去一对因子。
【判断题】花生饼作为饲料时要注意在日粮中补充适量的硒。( )
【单选题】读下列经纬网图,完成下列选项。 以上四幅经纬网图的图幅面积相同,其中实际面积最大的是()
【单选题】This passage is probably taken from the ______ of an English text book.
【单选题】The overall purpose of the passage is to______.
A.
describe the British as shoppers
B.
introduce shopping places in London
C.
show how the British have changed from shopkeepers to shoppers
D.
indicate the British are better at doing business than other people
【单选题】The 2010 Expo will take place in Shanghai, ________ many countries consider a good chance to introduce their cultures to the world.