Which of the following objects is NOT normally used in current space exploration?
a. space shuttles
c. single use rockets
b. space stations
d. space probes

Respuesta :

AL2006

a).  Space shuttles.
       Yes.  NOT current.
       The last space shuttle flight was in July 2011.

b).  Single-use rockets.
       No.  Current.
       The first successful test of a re-usable booster
       took place just in the last few weeks.
       Currently, EVERYTHING is single-use.

c).  Space stations.
       No.  Current.
       The International Space Station is currently operational.

d).  Space probes.
       No.  Current.

Answer:

space probes

Explanation: