A.head
B.hand
C.eye
D.ear

A.coming nearer to
B.catching sight of
C.pointing at
D.looking up to

A.on
B.to
C.at
D.for

A.greeted
B.thanked
C.congratulated
D.agreed

A.\(\frac{R}{{\sqrt {{R^2} + Z_C^2} }}\)
B.\(\frac{{\sqrt {{R^2} + Z_C^2} }}{R}\)  
C.\(\frac{{\sqrt {\left| {{R^2} - Z_C^2} \right|} }}{R}\)  
D.\(\frac{R}{{\sqrt {\left| {{R^2} - Z_C^2} \right|} }}\)

A.Mĩ.
B.Pháp.
C.Anh.
D.Liên Xô.

A.Russian cosmonaut Yuri Gagarin was the first man to fly to space in April 1961.
B.The longest time spent in space by an astronaut is a year.
C.Most astronauts encounter short-lived or long-lasting physical issues.
D.Astronauts have to pay their full attention when travelling in space.

A.dedication
B.robots
C.people
D.astronauts

A.Being able to easily blend with people
B.The ability to travel a long distance
C.Being able to regulate his or her emotions
D.The competence to act in different situations

A.delivered
B.dissolved
C.separated
D.removed