問題詳情

請依下文回答第 36 題至第 40 題:  What causes autism is a mystery.One 36 is that a phenomenon called the cellular-danger response (CDR) lies at the root of it.The CDR makes cells put their ordinary activities 37 and instead switch on their defence systems, in reaction tohigh levels in the bloodstream of chemicals called purines. These are important and widespread 38 : ATP, a molecule that shuttles energy around cells, is a purine; so are halfthe “genetic letters” in DNA. Cells under viral attack tend to shed them. Too many of them in the blood can thus be asignal of viral infection. In that case 39 the CDR makes perfect sense. But studies have shown that people withautism (and also those with some other brain conditions, such as schizophrenia) often seem to have chronic CDR. Thepurine signal has somehow 40 in the “on” position. Yet why this happens is obscure.
36
(A) theorem
(B) theory
(C) axiom
(D) adage

參考答案

答案：B
難度：簡單0.801223
統計：A(31),B(262),C(27),D(7),E(0)

內容推薦

內容推薦