题干

在黄瓜的植株上,有一半左右的花不会结果,其最可能的原因是这些花(  )

A:只有雄蕊

B:只有雌蕊

C:没有传粉

D:没有柱头

上一题 下一题 0.0难度 选择题 更新时间:2019-01-30 03:01:15

答案(点此获取答案解析)

A

同类题1

阅读短文及文后A-E选项,选出可以填入各题空白处的最佳选项。

Jellyfish and Crocodiles(水母和鳄鱼)

    Hi, my name's Ben. My family, that's Mum, Dad and me, live in Broome in Western Australia. Western Australia is about 80 times larger than Italy, but only 1.5 million people live there. ____ It has a population of about 12,000. It’s right on the coast and is known for its famous Cable Beach, which is 20km long.

    We live in the town in a house with a large garden. ____ We drive to Cable Beach and look for a quiet place to swim or to fish. We don't go swimming from October to March because there may be box jellyfish in the water. The box jellyfish is one of the most dangerous jellyfish. ____ If you are attacked by one, the best thing to do is to pour vinegar(醋)over the area of your body where you are hurt. That's why we always take a bottle of vinegar with us.

     ____ A year ago I went camping in the bush with my friend Bill and his dad. We wanted to do some fishing and set up camp about 20 metres from a river. ____ Bill's father told us to get up and we quickly got out of the tent and ran to the car, which was only 10 metres away.

    Bill's dad started the car and turned on the head

A.lights. In the light, we could see a big crocodile pulling the tent into the river!

B.In Australia, they kill up to 65 people a year.

C.Broome is a town in the north of Western Australia.

D.Another dangerous animal in Western Australia is the saltwater crocodile.

E.At weekends I often go fishing or swimming with my friends or my parents.

F.Suddenly, at 3 o’clock in the morning, we felt something pulling on our tent.


同类题3

列宁曾说,“唯心主义是生长在人类智慧之树上的一朵不结果实的花。而宗教就是唯心主义的重要体现。阅读下列材料:

材料一:在神学统治的年代,盲目信仰、禁欲主义成为至上的美德和追求,人类失去了真实的自我和真实的生活。

——张成岗《从神本到人文:“文艺复兴”时期人文精神解读》

材料二:马西莫·菲尔波精辟地指出:“文艺复兴时期罗马的辉煌,成为数十年间杰出的艺术家们荟萃的中心,如果没有教会的大量订货和教皇与红衣主教们用之不竭的消费,是不可想象的,因为这些都是最重要的社会前提之一。”

——欧金尼奥·加林《文艺复兴时期的人》

材料三:虽然世俗题材艺术品的数量和比例都有所增加,世俗绘画的比例从15世纪20年代的5%上升到16世纪20年代的约20%,但宗教题材的艺术品一直占绝对优势。

——彼得伯克《意大利文艺复兴时期的文化与社会》

材料四:文艺复兴中人们重视人的价值、重视现世的生活以及反对“权威”的精神,都在当时人中间唤起了对于天主教会及其神学的怀疑及反感。……文艺复兴运动培养了大批人才。这些人中有的被称为基督教人文主义者、人文主义泰斗,有的被誉为宗教改革的先驱,他们在各自不同的领域对宗教改革运动的发生和发展起了巨大的作用。

——林涛《浅议文艺复兴对宗教改革的影响》

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