原文:少壮不努力,老大徒伤悲。译文:If you lie down with dogs, you will get up with fleas.

Pediculosis<br/>is caused by: () A: Fleas B: Lice C: Scorpions D: Ticks E: Mites

Epidemic typhus fever is transmitted by A: Lice B: Fleas C: Mosquitoes D: Ticks E: Mites

Plague is transmitted by A: fleas B: mosquitoS C: lice D: sucking blood flies E: sand flies

________ helped to spread the plague in Dark Ages in Europe. A: Cats B: Dogs C: Rats and Fleas D: Birds

Which of the following arthropods do not transmit zoonoses ( ) A: Fleas B: Lice C: Mosquitoes D: Chigger mites

Insect carrying out incomplete metamorphosis is ( ) A: mosquitoes B: flies C: fleas D: lice E: sandflies

What is the cause of the 14th century Plague? A: Bacteria in the human body B: Pestis from the rats C: Overgrowth of the fleas D: continuous warfare

The Black Death in the 14th century ______. A: spread through the whole world B: was an epidemic disease spread by rat fleas C: killed two thirds of the population in England D: spared those who were rich enough to afford the expensive medicine

Nothing must be done hastily but killing of fleas. 未知类型：{'label': 'questionDesc', 'content': '请选择正确的翻译。', 'isMemberControl': 0, 'type': 181} A: 天助自助者，自弃者天弃之。 B: 除非消灭跳蚤，做事不必急躁。