The staffs of the company are always courteous and helpful.
A. efficient
B. respectable
C. well-informed
D. respectful
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The relationship between exposure to ______ has not yet been determined.
A. ozone and fall in lung function
B. ozone and lung diseases such as asthma
C. nitrogen dioxide and worse lung function
D. smog and chronic bronchitis and emphysema
下列关于印花税计税依据的表述中，符合印花税条例规定的是( )。
A. 对采用易货方式进行商品交易签订的合同，应以易货差价为计税依据
B. 货物运输合同的计税依据是运输费用总额，不含装卸费
C. 建筑安装工程承包合同的计税依据是承包总额扣除分包或转包金额后的余额
D. 对于由委托方提供辅助材料的加工合同、无论加工费和辅助材料金额是否分开记载，均以其合计数为计税依据
What do we learn about deserts from this text
A. Deserts can change into green and fertile areas.
B. Certain areas have always been desert.
C. Deserts were once the home of elephants and giraffes.
Deserts have been growing since the beginning of the worl
Which of the following is NOT mentioned as a possible cause of lung diseases
A. The burning of coal
B. Long-term exposure to smog
C. Exposure to nitrogen dioxide
D. Attending school camps
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