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【单选题】
断裂基因的叙述正确的是A.
结构基因中的DNA序列是断裂的
B.
外显子与内含子的划分不是绝对的
C.
转录产物无需剪接加工
D.
全部结构基因序列均保留在成熟的mRNA分子
E.
真核生物基因的共同结构特点
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举一反三
【单选题】Preventer bars are fitted on lifeboat releasing hooks to prevent（）.
A.
the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered
B.
operation of the release lever until the boat is waterborne
C.
the falls from rehooking after they have been released
D.
accidental unhooking when the falls become slack
【单选题】Which statement is true?
A.
Inventoriable costs affect only the balance sheet
B.
Inventoriable costs affect both the balance sheet and the income statement
C.
Period costs affect both the balance sheet and the income statement
D.
Period costs affect only the balance sheet
【单选题】What’s the meaning of the sentence “Take a leaf out of Li’s book!”?
A.
Plant trees for Li.
B.
Follow Li’s example.
C.
Ask Li to write a book.
D.
Keep a lot of leaves for Li.
【单选题】Which statement is true?
A.
A pidgin is a language which aquires native speakers.
B.
Pidgins are used almost exclusively for affective functions.
C.
The language which supplied most of the vocabulary is known as substrate.
D.
A creole is a pidgin which has expanded in structure and vocabulary.
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