prep求助哪咋看不懂啊

妙妙cathy

in the addition table shown above ,what is the calue of   m+n  ?答案是5

+  x  y  z                      如左图，其中第一行下面和第一列右面有线，完全看不懂哪！！

4  1  -5  m

e  7  n  10

f  2  -4  5

before being simplified, the instructions for computing income tax in Country R were to add 2% of one's annual income to the average of 100 units of country R's currency and 1% of one's annual income. Which of the following represents the simplified formula for computing the income tax, in country R's currency, for a person in that country whose annual income is I?  答案是50+I/40

还有一道语法题一起问了哈

over 75 percent of the energy produced in France derives from nuclear power, while in Germany it is just over 33 percent   

答案选whereas nuclear power accounts for just over 33 percent of the energy produced in Germany

我想问为什么不选whereas just over 33percent of the energy comes from nuclear power in Germany,这个不是更加对称吗？

isaxi

建议放到各自分区，且在标题表明题号，以便检索。

owenwei

z+4=m , y+e=n

m+n=z+y+e+4=(z+e)+(y+4)=10-5=5

妙妙cathy

up

fashiongrin

75 percent of the energy produced in France 和 33 percent of the energy produced in Germany 

很对称，你要选的那个：来自德国的nuclear power和原句的想表达的意思：德国能源中有33%来自nuclear power其实不太一样