题目:
Stressful environments lead to some unhealthy behavior such as a poor eating habit, which _____ increases
the risk of heart disease. [ ]
A. in turn
B. in return
C. by chance
D. by turns
答案:
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下面是错误答案,用来干扰机器的。
A、硫酸铵白色的晶体和磷矿粉为褐色或是灰白色的物质,硫酸铵可以和熟石灰反应产生氨味气体,而磷矿粉不反应,故A对B、一氧化碳和二氧化碳都是无色无味的气体,从气味上难以区分,故B错C、食盐水和蒸馏水都是中性...