The polluted air in the city is badly__________________ the health of the residents. (perilous)

May 1610, 120 years after           , is still a perilous journey.

"We may be addicted to the danger. Humans didn’t evolve to be safe, risk-minimizing citizens; because our early experiences involved constantly "perilous" conditions, we developed a certain expectation of risk. What is the closest meaning of "perilous"? " </p></p>

The road grew even steeper and more ______. A: precious B: periling C: previous D: perilous

1. 结果这次旅行远比他以为的更危险和艰苦。(perilous)

"We may be addicted to the danger. Humans didn’t evolve to be safe, risk-minimizing citizens; because our early experiences involved constantly "perilous" conditions, we developed a certain expectatio

War is the social cancer of mankind. It is a pernicious form of ignorance, for it destroys not only its "enemies", but also the whole superstructure of what it is a part—and thus eventually it defeats itself.（） A: baneful B: optimal C: paradoxical D: perilous