如图是桃花的结构模式图，下列有关说法不正确的是_刷题宝

题干

如图是桃花的结构模式图，下列有关说法不正确的是（　　）

A：花的雌蕊由①②构成

B：④是雄蕊，它包括花药和花丝两部分

C：花药里的花粉成熟后散发出来落到①上，花受粉后整个③发育成果实

D：③内的胚珠发育成种子，它最主要的结构是胚

上一题下一题 0.0难度选择题更新时间:2018-04-26 10:01:46

答案(点此获取答案解析）

A

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\sqrt{3}

sin2x﹣cos2x的图象可由函数

y = 2 s i n (2 x + \frac{π}{6})

的图象至少向右平移____个单位长度得到．

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若一个三棱锥中，有一条棱长为a，其余棱长均为1，则其体积F（a）取得最大值时a的值为（　　）

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3000－102×42÷17=____

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如图中A，B分别是某微粒的结构示意图，回答下列问题：

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My dear friend．
    I'm on vacation on an island(岛)in Greece．I arrived on Saturday morning．I stay in a hotel and it has a pool．The island is beautiful．It is hot and sunny here every day．
    Yesterday ,I went to the beach early in the morning．I took a long swim and then I sunbath(沐目光浴)．Next．I had lunch at a small restaurant near the beach．I met some boys from Romania at the restaurant．They were all very friendly．After lunch we played volleyball on the beach．
    This morning, I went to Delos．After that I went shopping and I bought you a nice gift．I'm sure you'll like it．
    See you when I get home．
    Love；
    Helen

Mr. James
Hook
1128 West
Fourth
Avenue
New York
NY10003
USA

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