The 10% markup rate of the commercial invoice value in an insurance policy is to cover the accidental costs involved.
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Isolation is as dangerous as smoking and obesity.
A. 对
B. 错
Isolation may cause heart disease and shorten life span.
A. 对
B. 错
Loneliness increases the risk for rea physical pain.
A. 对
B. 错
The simple act of saying "hello" can enhance our immune system.
A. 对
B. 错
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