与桃花的有性生殖有直接关系的结构或生理现象是: ①花粉②胚珠③花冠④花柄⑤花萼⑥

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问题:

与桃花的有性生殖有直接关系的结构或生理现象是:

①花粉②胚珠③花冠④花柄⑤花萼⑥传粉⑦受精⑧开花⑨卵细胞⑩精子

A.①②③④⑤⑥⑦⑧⑨⑩

B.④⑤⑥⑦⑧⑨⑩

C.①②⑥⑦⑧⑨⑩

D.④⑤⑥⑦⑧⑩

考点:植物的有性生殖植物的无性生殖植物无性生殖的应用
题型:选择题

When I was growing up, I was embarrassed to be seen with my father. He (1) severely crippled and very short, and when we would walk together, his hand on my arm (2) balance, people would stare. I would inwardly be afraid (3) squirm at the unwanted attention. If he ever noticed or was bothered, he never let (4) .
It was difficult to coordinate (5) steps - his halting, mine impatient - and because of that, we didn’t say much as we went along. But as we started out, he always said, "You (6) the pace. I will try to adjust to you. "
Our usual walk was to or (7) the subway, which was how he got to (8) . He went to work sick, and (9) nasty weather. He almost never missed a day, and would (10) it to the office even if (11) could not: a matter of pride!
He never talked about himself as an object of pity, (12) did he show any envy of the more fortunate or able. What he looked for in others was a "good heart", and if he found one, the owner was good enough for him.
Now that I am older, I believe that is a proper standard (13) which to judge people, even though I still don’t know precisely (14) a "good heart" is. But I know the times I don’t have one myself.
He has (15) gone many years now, but I think (16) him often. I wonder if he sensed my reluctance to be seen with him during our (17) . If he did, I am (18) I never told him how sorry I was, how unworthy I was, how I regretted it. I think of him when I complain about trifles, when I am (19) of another’s good fortune, when I don’t have a "good heart".
At such times I put my hand on his arm to regain my (20) , and say, "You set the pace, I will try to adjust to you.\

题型:选择题

“谁知盘中餐,粒粒皆辛苦”说明了[ ]

A、我们要养成勤于劳动的习惯

B、我们要珍惜劳动成果,养成勤俭朴素的习惯

C、我们要养成节约时间的习惯

D、我们要珍惜时间

题型:选择题

生物种类的多样性实质上是______的多样性.

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判断妊娠合并糖尿病孕妇治疗效果的依据是 ()

A.尿糖定量

B.尿糖定性

C.尿酮体测定

D.空腹血糖测定

E.75克葡萄糖耐量试验

题型:选择题

过滤器滤芯的物理再生法之一是用压力为()MPa的压缩空气反吹。

A.0.1~0.2

B.0.2~0.4

C.0.4~0.6

D.0.6~0.8

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