問題詳情
花粉症是一種季節性過敏，空氣中的花粉和真菌孢子含量高達46。它通常發生在每年的2月47日和5月，那時樹木將大量花粉釋放到環境中。花粉症的一些常見症狀48眼睛發癢，流鼻涕和頻繁打噴嚏49。奇怪的是，當一個人花粉熱時，他們的免疫系統實際上對一種無害的物質反應過度。為了處理過量的花粉，人體會將50種叫做組胺的化學物質注入人的鼻子，嘴巴和眼睛，從而觸發過敏反應。
46.
(A) consequence
(B) significance
(C) stimulus
(D) reaction
46.
(A) consequence
(B) significance
(C) stimulus
(D) reaction
參考答案
無參考答案
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