Directions:In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a parag...
you don't get sick. Or, if you do get sick, you usually only get a very mild version of an illness.When this happens, you are said to have protective immunity to a disease. Depending on the situation, immunity might last for months or years. You mi...
17. If you were stranded on a deserted island and you could have only one item, what would it be? 如果你被困在沙漠中但只能带一样东西,你会带什么? 没错,就是这个经典的问题,通...
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