
【名词&注释】
木质部(xylem)、裸子植物(gymnosperm)
[单选题]多数裸子植物茎的木质部无导管。( )
A. 正确
B. 错误
查看答案&解析
举一反三:
[单选题]马鞭草科(Verbenaceae)与唇形科的区别在于前者花冠非二唇形。( )
A. 正确
B. 错误
[单选题]Your stay on the islands will be most impressive mainly because of .
A. the beautiful sea views
B. Darwin’s inapiring trip
C. a clder view of animals
D. various daring activities
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