题目

When you study the local map, you'll find this town is ________. A . as twice as that one B . twice as a large town as that C . twice as larger as that one D . twice as large a town as that 答案：D竹子的茎生长到一定程度后就不会继续长粗，下列解释正确的是（    ）A.茎内没有维管束                B.茎内没有输导组织C.茎内没有活跃的形成层          D.韧皮部和木质部退化