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搜尋:serpentine

48 當受到驚嚇腎上腺髓質(adrenal medulla)分泌 hormone 作用到肝臟、心臟、肌肉,使心跳 加速、血壓上升、細胞內能量使用代謝增高。此 hormone 先與細胞之 serpentine receptor 結合,下列何者是此類 receptor 的特性:
(A)屬於 G(GTP-binding)regulatory proteins
(B)主要在調控ion transport
(C)出現在細胞核以調控 gene expression
(D)具有多重 membrane-spanning helical domains

II. Cloze (2 points each; 38 points in total): Choose the most appropriate answer. Passage One: Questions 13-22 Long lines at airport security checkpoints make air travel an ordeal. But not everyone has to wait in the 13 queues. Those who buy first-class or business-class tickets can use 14_ lanes that take them to the front of the line for screening. British Airways calls it Fast Track, a service that also lets 15 passengers jump the queue at passport and immigration control. Critics complain that a fast track through airport security should not be for sale. Security checks,they argue, are a matter of national defense, not an 16 like extra legroom or early boarding privileges; the burden of keeping terrorists off airplanes should be shared equally by all passengers. The airlines reply that everyone is 17 to the same level of screening; only the wait 18 by price. As long as everyone receives the same body scan,they maintain,a shorter wait in the security line is a convenience they should be free to sell. Amusement parks have also started selling the right to jump the queue. 19_,visitors may spend hours waiting in line for the most popular rides and attractions. Now, Universal Studios Hollywood and other theme parks offer a way to avoid the wait: for about twice the price of standard admission, they’ll sell you a pass that lets you go to the head of the line. Expedited access to the Revenge of the Mummy thrill ride may be 20 less freighted than privileged access to an airport security check. Still,some observers lament the practice, seeing it as 21 of a wholesome civic habit: “Gone are the days when the theme-park queue was the great equalizer,” one commentator wrote, “where every vacationing family waited its turn in 22 fashion.”
【題組】13.
(A) separate
(B) optional
(C) serpentine
(D) progressive

編輯私有筆記及自訂標籤
答案:D
難度:適中