A-A+
How can quantum dots be used to confirm diseas
问题详情
How can quantum dots be used to confirm diseases？ 查看材料
A.By traditionally looking at a person"s blood under a microscope.
B.By letting a person take some kind of medicine.
C.By lighting up in the presence of a targeted molecule.
D.By subjecting a person to an X-ray examination.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
细节题。题干：quantumdots是怎么被用来辨认疾病的?题干中的信息词为quantumdots，conftrmdiseases，用信息词定位到第三段最后两句：Quantumdotsareparticlesthatgiveofflightwhenactivated．Researchersarestudyingwaystoprogramthemtoidentifydiseasesbylightingupinthepresenceofatargetedmolecule．quantumdots直接出现在原文中，identifydiseases与题干中confirmdiseases为同义改写，表示“辨认疾病”。原文说，如果存在靶分子(quantumdots)的话，量子点就会发光，以此辨认疾病。选项C的内容来自原文中的“bylightingupinthepresenceofatargetedmolecule”，本题答案为C选项。
