16．The force of ________slows the spacecraft down as it re-enters the earth's atmosphere．（　　）
A．frictionB．assessmentC．appointmentD．inspiration

分析 航天飛機(jī)重返大氣層時(shí)因有摩擦力而減慢速度．

解答 答案是A．本題考查名詞詞義辨析．A項(xiàng)表示"摩擦"；B項(xiàng)表示"評(píng)估"；C項(xiàng)表示"約定，任命"；D項(xiàng)表示"激發(fā)，靈感"； the force of friction摩擦力，所以答案選擇A項(xiàng)，其它選項(xiàng)不符合邏輯．

點(diǎn)評(píng) 本題考查名詞詞義辨析，考生在平時(shí)的學(xué)習(xí)中應(yīng)注意積累相應(yīng)的詞匯和搭配，并牢記其意思．在做題時(shí)，將詞義和題干相結(jié)合，從語(yǔ)法、句子結(jié)構(gòu)尤其是句意上去判斷，句意通順，符合邏輯，即正確答案．

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