24______

【名词&注释】

初生木质部(primary xylem)

[单选题]24______

A. enter
B. leave
C. open
D. close

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学习资料：

[单选题]

A. surprise
B. puzzle
C. story
D. joke

[单选题]What would Hilary expect most from modern life in the three months? [ ]

A. To play computer games
B. To make phone calls
C. To listen to music
D. To chat on the Internet

[单选题]根的初生木质部成熟方式为外始式，而在茎中则为内始式。( )

A. 正确
B. 错误

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