• 2021-04-14
    We cannot do experients on animals for curing the humans' diseases.
  • 内容

    • 0

      Animals cannot talk about the things except those about food, danger, enemy, etc. because the communicative signals of animals do not have the property of displacement.

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      We can all do something to help animals and its never too late to _________________.

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      What's the main writing purpose of Text A? A: To explain why the old infectious diseases resurge. B: To discuss the measures that we should take to prevent and reduce the threats from infectious diseases. C: To provide a scientific explanation for emerging and re-emerging infectious diseases D: To call for universal concern over the resurgent and re-emergent diseases

    • 3

      We cannot figure out _______ quite a number of insects, birds, and animals are dying out. A: that B: as C: why D: when

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      The case ________ using animals in research: a) Animals ________ a lot during the experiments. b) Much of the research is ________. c) Animals have ________ as humans do.