問題詳情

II. Cloze: Choose the best answer for each blank. (20%)Passage AAmphibians are ectothermic. That is, they depend on external heat 11 . such as the sun, to raisetheir body temperature. Most amphibians spend the early part of their lives in water and the adult part onland. During the early, 12 period, amphibians use gills for respiration. Later on land, most breathethrough lungs. Amphibians can also absorb oxygen through their skin, which is generally smooth, moist, andscaleless. In most species of salamanders, the lungs do no function. All respiration is through the skin and themucous membranes of the mouth.Amphibian 13 are well developed. Frogs and toads have excellent sight and depend on their eyesto find food. Salamanders have good eyes and also keen smell. When they hunt for food, they use both sightand smell. For the burrowing life of caecilian, good eyesight is not a necessity. They hunt mainly by smell.They have two tentacles, or feelers, near the mouth. As they move through the ground, the tentacles pick upfood 14 .Young amphibians vary in their diets. Some eat mainly plant materials. Others eat a mixture of plant andanimals. Adult amphibians, 15 , are almost entirely meat eaters and make insects the bulk of their diet.
11.
(A) exchangers
(B) sources
(C) influxes
(D) extinguishers

參考答案

答案：B
難度：簡單0.715909
統計：A(10),B(63),C(9),D(2),E(0)

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