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Which transportation form can be more suitable for the firefighters or emergency team?

A. Hyperloop
B. Marin Jetpack
C. Self-driving cars
D. Urban transport pods

When will the self-driving cars be available commercially by prediction?

A. 2021
B. 2018
C. 2019
D. 2020

患者,刘某,女性,30岁,常常在晨起及晚间躺下时咳大量脓痰,伴少量鲜血,并且痰液放置后分三层,可能是

A. 慢性支气管炎
B. 肺癌
C. 肺结核
D. 支气管扩张
E. 肺气肿