____ with the space, the size of the earth seems not large at all.
A.Comparing
B.When compared
C.while comparing
D.When comparing
A.Comparing
B.When compared
C.while comparing
D.When comparing
An appropriate title for this passage would be ______. ()
A.Rendezvous in Space
B.Landing at a Space Station
C.New Radar for the Space Age
D.Space Navigation
Are you______spending more money on the space program?
A.in favor of
B.by favor of
C.in favor to
D.out of favor
Laser-doppler radar is especially valuable in space missions because ______. ()
A.it is one thousand times more precise than microwave radar
B.it provides precise measures of the velocity of space vehicles
C.it is a new system of radar
D.it can measure the movement of a spaceship less accurately than a microwave radar
A.take back
B.break out
C.bring about
D.keep out
The best title of this article is ______.
A.Eating and Sleeping in Space
B.How Astronauts Eat in Space
C.Food for Space
D.How Astronauts Sleep in Space
A.too many rooms
B.too much space
C.too many spaces
D.too much room
A.short
B.scarce
C.rare
D.unexpected
“Only a naïve person would believe such a story about intelligent beings from outer space visiting the earth,” ()said Jason.
A.credible
B.innocent
C.credulous
D.ignorant