吸烟的习惯有害自身的健康 2．吸烟对周围人的影响 3．希望他能戒烟 A Letter to a Roommate

A．does not result in homogeneity of local cultures
B．is somewhat related to globalization
C．is one of the long-term historical trends
D．has shaped different traits in industrial countries

A．the hope that men could fly long distances through the air would remain a dream
B．it is clear that building a machine by which men shall fly long distances is impossible
C．all physical facts have demonstrated that men can not fly long distances through the air
D．men have not yet learned to produce a flying machine with known substances and known forms of machinery and force