在单次行程工作规范下，压力机可以进行哪些工作？
询问青少年证人时应注意哪些礼仪？
The dew point is reached when the（）. ["temperature of the air equals the temperature of the seawater","atmospheric pressure is 14.7 lbs. per square inch","relative humidity reaches 50%","air becomes saturated with water vapor"]
网上银行USBKey有效期为（）年，过期失效，客户如需继续使用，应及时办理更新手续。 ["1","2","3","5"]
购买五年期国库券和三年期国库券，其（） ["期限性风险相同","违约风险相同","利息率风险相同","购买力风险相同"]
询问证人时有哪些基本礼仪？
