It said the country's confirmed H7N9 cases were isolated and there has been no______ of human-to-human transmission.
A．markB．symbolC．signD．signal
C

試題分析：考查名詞辨析：A. mark記號(hào)B.symbol 象征C.sign跡象D.signal信號(hào)，句意：據(jù)說(shuō)這個(gè)國(guó)家的確認(rèn)H7N9病例被隔離,沒(méi)有任何跡象表明人際間的傳播。選C。
點(diǎn)評(píng)：詞義辨析題在高考中有所涉及，每年的趨勢(shì)不盡相同。對(duì)于詞義辨析題目，首先可以從句意著手，看懂句意是解答此類題目的關(guān)鍵，其次四個(gè)選項(xiàng)的意思也要了如指掌。這對(duì)于平時(shí)學(xué)生的學(xué)習(xí)仔細(xì)度提出了要求，學(xué)生在平時(shí)的學(xué)習(xí)中要勤積累，多記憶，多查字典，以便在考試時(shí)能夠迅速準(zhǔn)確的答出。
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