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【单选题】
蝴蝶兰主要通过（ ）来控制花期A.
低温诱导
B.
修剪
C.
光照管理
D.
化学药剂
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举一反三
【简答题】听力原文： Franklin D.Roosevelt was the thirty-second president in America history. Franklin Roosevelt was born in 1882 at Hyde Park, New York. He attended Harvard University and Columbia Law School. In 19...
【单选题】National Geographic Lifts Veil on Air Force One Until Franklin D. Roosevelt, no U. S. President traveled by air while in office. World War Ⅱ changed that, and since then an executive aircraft has been...
A.
Y
B.
N
C.
NG
【单选题】Frank Friedel, in creating a biography of the United States president Franklin D.Roosevelt, has had to wrestle with something like 40 tons of paper.
A.
reckon
B.
ponder
C.
tackle
D.
challenge
【单选题】In the United States, Franklin D.Roosevelt was the only president to be elected more than twice. In 1951, the Twenty-second Amendment to the Constitution was passed to limit a president to______term(s...
A.
one
B.
two
C.
three
D.
four
【简答题】Franklin D. Roosevelt argued that the depression stemmed from the American economy’s ________ flaws. A) underlining B) vulnerable C) vulgar D) underlying
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