According to the passage, East Timorese short-term economic development will be largely determined by______.

A．Raising one's eyes.
B．Turning better.
C．Searching for.
D．Paying a visit.

A．scientists have discovered the working mechanism of the nose
B．humans detect odors with a large number of receptors responsive to the odorous molecules themselves
C．the receptors integrate various responses to the characteristics of an odor and store them in the brain
D．e-noses operate on principles totally different from those of a real nose