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【单选题】
根的木栓形成层最初由( )细胞恢复分裂而形成。A.
中柱鞘
B.
外皮层
C.
内皮层
D.
表皮
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反馈参考答案：
举一反三
【简答题】已知等比数列{a n }中，a 6 ?a 7 =1，a 10 ?a 11 =16，则a 8 ?a 9 等于______．
【单选题】在正项等比数列{a n }中,a 1 ,a 19 分别是方程x 2 -10x+16=0的两根,则a 8 ·a 10 ·a 12 等于( )
A.
16
B.
32
C.
64
D.
256
【判断题】Thirty-seven years after his sudden death, a lifelike figure of Bruce Lee was unveiled at Madame Tussaud’s wax museum in Hollywood in 2010. He is not only remembered for the movies and TV shows in whi...
A.
正确
B.
错误
【单选题】Mrs. Smith made her students _ the compositions three times a week.
A.
write
B.
to write
C.
written
D.
writing
【简答题】My classmates are busy ( ) (write) compositions.
【简答题】计算机网络的基本功能有哪些？
【单选题】We don't want all the details now, just the____picture.
A.
overall
B.
specific
C.
special
D.
detailed
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