已知如下 FOR i:= n DOWNTO 1 DO {语句1} BEGIN x:=x+1; {语句2} FOR j:=n DOWNTO i DO {语句3} y:=y+1; {语句4} END; 语句1执行的频度为_______ ;语句2执行的频度为 _______ ;语句3执行的频度为 _______;语句4执行的频度为_______。(精确表示)
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参考答案:
举一反三
【单选题】According to the passage,the hunters imitate ostriches because_____.
A.
they want to gain the trust of their intended prey
B.
they would like to entertain each other after a hard day's work
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