②Last year's study of whale calls also suggests a threatening reason for the drop in pitch, however. Perhaps whales don't need to be so loud because sound waves travel farther in oceans made acidic by the absorption of carbon dioxide. (第五段) 译文:然而,去年对鲸鱼叫声的研究也表明了音调...
根据“Scientists don’t yet know why whales prefer to produce babies in tropical locations. But the ocean there may be warmer and calmer and have fewer killer whales that would feed on baby blue whales”可知,因为小蓝鲸很容易在热带水域存活。故选D。5.推理判断题。本文是一篇关于蓝鲸的科普文章,...
Sharp decrease of whales' populations.D. Underwater noises by ships and industries.3. What does the underlined word “modulate” mean in thelast paragraph?DA. Produce.B.Damage.C. Balance.D. Change.4. What can we infer from the text?BA. Man is the soul of nature.B. Man and nature ...
When sperm whales eat squid, they produce ambergris to protect their stomach linings from sharp squid beaks. Sperm whales puke or poop out waxy lumps of ambergris, which then float on the ocean until they are collected and sold. In 2016, three fishermen from Oman harvested 80 kilograms (176...
Blue whales,the earth's largest animals,call to others of their kind,though exactly what these cries communicate remains a mystery.But these sounds have begun evolving (演变).Since at least the 1960s,the pitch (音调)of Antarctic blue whales has downshifted.Scientists have theories as to why:...
As theirpopulations have grown, then, the whales may have decreased their volume because they are more likely tobe communicating over short distances.Last year's study of whale calls also suggests a threatening reason for the drop in pitch, howeverPerhaps whales don't need to be so loud ...
Sharp decrease of whales' populations .D . Underwater noises by ships and industrieS .(3 )What does the underlined word "modulate" mean in the last paragraph?A . Produce .B. Damage.C. Balance .D. Change .(4)What can we infer from the text?A . Man is the soul of nature .B . ...
If you don't want to buy headphones from Bose or Sony for whatever reason, these Marshalls are a great alternative. The headphones look stylish and boast excellent audio chops. They also offer support for Bluetooth LE Audio and Auracast, which futureproofs them. Last, they offer an incredible...
C . Sharp decrease of whales' populations; D . Underwater noises by ships and industries. (3) What does the underlined word "modulate" mean in the last paragraph? A . Produce. B . Damage. C . Balance. D . Change. (4) What can we infer from the text? A . Man is the soul...
However, subsidies are not the main reason for farmers to choose to cultivate rice, maize, or soybeans. Particularly, about 50.3% of the farmers thought that planting those strategic crops was profitable, although they did not received any subsidies from the government. Moreover, the results ...