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【单选题】

The bat is a marvel of evolutionary adaptation. Most of them roost during the day, and are active at night or twilight for they can avoid objects in the dark. I have seen this phenomenon at work. In my youth, I used to explore old mining shafts in the Randsburg district. Sometimes my intrusion disturbed clans of bats that were hanging upside down in the dark caves.
They would fly about to evident panic, but the panic was mine, not theirs. Some flew crazily out into the daylight but some merely returned to their perches. None ever touched me, much to my relief.
They may exist but I have never seen a stuffed nylon bat. To children, bats may not be as lovable as koala bears. Perhaps manufacturers do not regard them as marketable. It is not so much their hideous faces and winged bodies that have caused us to get rid of bats, but rather the ancient myths in which dead humans, such as Count Dracula, leave their graves at night in the form of bats to blood from human victims, especially fragile young woman. As we know from some movies these vampires must return to their graves before daylight. Enered young women can frustrate vampire by sleeping with a string of garlic around their necks.
There are actually three species of blooding bats. They are called vampire bats after the ancient legends, and their tactics are indeed frightful. Like Count Dracula, they feed at night. They make a small cut in their sleeping victim with sharp incisor teeth, usually not even awakening their prey. Then they the blood that sustains them.
Should that discourage children from wanting them as pets
As Mitchell notes from the New Yorker ad, bats are clean and intelt. Most of them are insect-eaters, and they serve nature by destroying crop-damaging insects. They also pollinate (传授花粉) flowers and spreading seed.
Bat Conservation International claims that without bats a host of insects/pests would multiply unchecked and many of our planet’s most valuable plants would go unpollinated.
It is clear that the bar is our friend, and that, despite its appearance, it is here to serve humanity.
I’d be the first to buy a stuffed nylon bat. Children’s hearts are big, and bats need love, too.
The toy companies are rarely interested in a toy bat probably because______.

A.
bats destroy crop-damaging insects
B.
bats are the marvel of evolution adaptation
C.
bats the blood of dying people
D.
bats inspire disgust based on some traditional beliefs
题目标签:花粉
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刷刷题刷刷变学霸
举一反三

【单选题】花粉引起的支气管哮喘属于

A.
Ⅰ型变态反应
B.
Ⅱ型变态反应
C.
Ⅲ型变态反应
D.
Ⅳ型变态反应
E.
非变态反应

【单选题】花粉引起的支气管哮喘属于

A.
Ⅳ型超敏反应
B.
Ⅰ型超敏反应
C.
Ⅲ型超敏反应
D.
非超敏反应
E.
Ⅱ型超敏反应

【单选题】天花粉来源于

A.
葫芦科植物栝楼或双边栝楼的干燥根
B.
葫芦科植物栝楼或双边栝楼的干燥根茎
C.
葫芦科植物栝楼或双边栝楼的干燥根及根茎
D.
葫芦科植物栝楼或双边栝楼的干燥花粉
E.
葫芦科植物栝楼或双边栝楼的干燥花及花粉

【单选题】具有正常花粉,给雄性不育系授粉,F1仍是雄性不育的是()。

A.
雄性不育系
B.
雄性不育保持系
C.
雄性不育恢复系
D.
以上三项都不是

【单选题】花粉入药的药材为

A.
菊花
B.
蒲黄
C.
西红花
D.
辛夷
E.
金银花