根据上文的结论,下文实验展开分析,Swiss scientists have found that exposure to this hormone puts us….所以研究中要求受试者要先处于这种环境中,所以名词exposure to 构成搭配语义关系,表示“接触”的意思,因此选择to。 9、【答案】[D] mood 【解析】此处考察上下...
The need for such planning is increasingly urgent. Already, since 2010, drought and insects have killed over 100 million trees in California, most of them in 2016 alone, an...
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