正确答案: A

improved

题目：46_____

解析：A

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举一反三的答案和解析：

[单选题]叶片较线形为宽，由下部至先端渐次狭窄，称为( )。

披针形

[单选题]— I wonder ________ you’ll water this kind of flower .——Every other day.

how often

[单选题]BWhen Mary Moore began her high school in 1951, her mother told her, "Be sure and take a typing course so when this show business thing doesn't work out, you'll have something to rely on." Mary responded in typical teenage fashion. From that moment on, "the very last thing I ever thought about doing was taking a typing course," she recalls.

She didn't follow her mother's advice.

[单选题]单被、无被花比两被花(双被花)原始。( )

错误

[单选题]根冠由于与土壤颗粒不断发生摩擦而死亡脱落，由( )细胞分裂补充.

分生区

[单选题]侧根是由维管形成层产生的。( )

错误

[单选题]第一节(共15小题；每小题2分，共30分)阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并

Sympathetic.