高考高頻詞匯:symptom、tray、tunnel、unit、

symptom[?s?mpt?m]

【詞頻】★★★☆☆

n. 癥狀；征兆

【例】n. 癥狀

（2006山東）Increasingly, Americans are becoming their own doctors, by going online to diagnose their symptoms, order home health tests or medical devices, or even self-treat their illnesses with drugs from Internet pharmacies.

【譯】越來越多的美國人正在成為自己的醫(yī)生，上網(wǎng)診斷自己的癥狀，訂購家庭健康測試或醫(yī)療設(shè)備，甚至用從網(wǎng)上藥店購買的藥物進(jìn)行自我治療。

tray[tre?]

【詞頻】★★★☆☆

n. 托盤；盤

tunnel[?t?n(?)l]

【詞頻】★★★☆☆

n. 隧道；地道；(動物的)洞穴通道

v. 挖隧道；挖地道

【例】n. 隧道

（2006江蘇）The lighting is at the top of the tunnel, practically at its highest point.

【譯】燈裝在隧道的頂部，幾乎是在隧道最高的位置。

unit[?ju?n?t]

【詞頻】★★★☆☆

n. 裝置；單位；整體；單元；(工作)班組；部門