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Dr.Sammy is a scientist.He studies insects(昆虫).Let's follow him into the insect world."I have been (1) interested.in insects since I was a little kid.I have learned many things about them from(2) booksin the library.My work now is to keep bees healthy." If you...
Grasshoppers probably have the most remarkable jumping ability of all these insects. If we think of it in human terms, a grasshopper's high jump is like a human jumping over a five story building. Imagine that a person jumping over a five story building. Welt, we'll take a look at the...
(二)(2023·安徽·统考一模)For years, David James, who studies insects at Washington State University, had wanted to examine the migration (迁徙)patterns of West Coast monarch butterflies (黑脉金斑蝶). The route the butterflies travel has been hardly known because the populations are too small...
Acute as a Bug's Ear: An Informal Discussion of Hearing in Insects When suddenly startled, a person is described as having his or her eyes opened as "wide as saucers," or as being "bug-eyed," in reference to the conspicuous eyes of insects such as the familiar houseflies, bees, drago...
(灵长目动物) researcher at the University of Cambridge, has found similar results in nature. She studies the large African monkeys known as mandrills. Mandrills have bright red noses that stand out against their white faces. Setchell’s work shows that the powerful males—the ones who are ...
return echoes coming through the headphones, then there is nothing in the way. If echoes do come back, then the closer the obstruction the faster the succession of bleeps and the deeper the pitch of each bleep. With practice, the torch could help a blind person to lead a more normal ...
Though he acknowledges that engineering works can fail because the person who thought them up or engineered them simply got things wrong, in this book Dr. Petroski widens his view to consider the larger context in which such failures occur. Sometimes devices fail because a good design is constru...
(单选题) A. a person could refuse medical treatment B. a person should not endanger his life by refusing medical treatment C. a person should not refuse medical treatment D. a doctor could force his patient into accepting his treatment 试题答案:A 3、 第(50)题选 (单选题) A. half B. ...
(繁殖). In India, for example, the warmer climate has increased the risk by about five times. Studies also suggest that global increases in temperature will drive disease—carrying insects from the equator (赤道) to the north.Thismeans some diseases like malaria or dengue fever (登革热) may ...