正确答案: A

纤维层

题目：与花药开裂有关的结构是( )。

解析：A

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]

finally

[单选题]下列几组词汇，最能准确反映“过渡时期”这一特殊年代的是

工业化 抗美援朝 三大改造

[单选题]BHaving a husband means an extra seven hours of housework each week for women, according to a new study. For men, getting married saves an hour of housework a week. “It’s a well-known pattern,” said lead researcher Frank Stafford at University of Michigan’s Institute for Social Research. “Men usually work more outside the home, while women take on more of the housework.”

is the main breadwinner D． is the master of the house

[单选题]叶表皮的一般特点为具有角质层、蜡质层和气孔，表皮细胞内含叶绿体。( )

错误

解析：解析：将“含”改为“不含”。

[单选题]The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.

ruled out

[多选题]限制苔藓植物向陆生生活发展，导致其只能生活在潮湿地方的原因是( )。

植物体内无维管束分化，输导能力不强

没有真正根的分化

精子具有鞭毛，借助水的作用才能与卵融合

解析：ABC

[单选题]I was ten when I first sat with my grandmother behind the cashier（收银台）in her general store. 71 I quickly learned the importance of treating customers politely and saying “thnak you.”At first I was paid in candy. 72 I worked every day after school, and during the summer and on weekends and holidays from 8 a.m. to 7 p.m. My father helped me set up a bannk account. 73

Before long, she let me sir there by myself.