2. 外语
  3. Living things can also do many other things that non-living things cannot do. Living things take【C1】______ food, and grow by con

Living things can also do many other things that non-living things cannot do. Living things take【C1】______ food, and grow by con

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问题     Living things can also do many other things that non-living things cannot do. Living things take【C1】______ food, and grow by converting the food into their own【C2】______ . Living things can move. They can get energy they need for movement by breaking down food during the【C3】______ of respiration. They excrete the waste products of respiration. Living things respond【C4】______ stimuli such as heat, light, and touch. A bird and a tree are【C5】______ because they do all these things. Living things are made up of tiny units called cells. Some simple plants and animals, and all bacteria,【C6】______ of only one cell. Many biologists consider bacteria as plants, but some【C7】______ them as neither plants nor animals. The vast majority of living things are made up of countless【C8】______ of cells. All the living parts of cells are made up of large molecules【C9】______ proteins. There are thousands of【C10】______ of proteins in each cell.
【C3】
选项 A、serious
B、series
C、serial
D、process
答案D
解析 serious是"严肃的"或"严重的"的意思。series的单、复数形式相同，意思是"一系列"或"一连串"或"一个接一个不问断的事件"等等。serial是"连续的"的意思。process指的是事物或动作等发展或发生的过程。因此用process符合题意。
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