7.If u>t,r>q, s>t, and t>r, which of the following must be true?
Ⅰ.u>s
Ⅱ.s>q
Ⅲ.u>r
a.Ⅰ only
b. Ⅱ only
c. Ⅲ only
d. Ⅰ and Ⅱ
e. Ⅱand Ⅲ
explanation:
from the given inequalities, we can conclude that q<r<t<u, and it is helpsul to know s>u or t<s<u. Thus, Ⅱand Ⅲ must be true, but Ⅰ myay be untrue. So E is the correct answer.
答案没错,但是and it is helpsul to know s>u or t<s<u 此句话是说能够知道是否s>u or t<s<u,还是说就是推出s>u or t<s<u? 后者好像是推不出来的吧?
帮我看看这句话的中文理解
另外,为什么下载的OGMATH 与大家的题号对不上呀?想查询都无从下手呀 | 
