【单选题】Princeton professor Freeman Dyson thinks that ______.
A.
scientists will find alien life similar to ours
B.
humans will be able to settle on Mars
C.
alien life will likely be discovered
D.
life will start to evolve on Mars
【单选题】According to Richard Freeman, the fast development of some developing countries
A.
places great pressure on capital markets
B.
intensifies the competition in labor markets
C.
deprives the developed countries of some profits
D.
hinders the global expansion of developed countries
【单选题】表面起绒,成品较为松软,适合做家居服装、毛巾、被面等的棉布是( )。
【单选题】在切削用量中,对切削刀具磨损影响最大的是()。
【单选题】在切削用量中,对切削刀具磨损影响最大的是( )。