Related Questions

A manned mission to Mars would allow a more in depth study of the Red Planet , and many have argued that construction a permanent base on Mars is much more practical than build one on the Moon Here, which two underlined sections need to be changed to correct the sentence?
A a,e
B c,e
C a,d
D b,c
Uranus takes ________ years to orbit the Sun.
A 48
B 84
C 50
D 60
According to the distance of planets from the Sun, which of the following order is correct?
A Mercury, Venus, Earth, Mars
B Mercury, Earth, Mars, Venus
C Mercury, Mars, Earth, Venus
D Mercury, Mars, Venus, Earth
_____ the formation of the sun, the planets, and other stars began with the condensation of an interstellar cloud .
A It accepted that
B It is accepted that
C Accepted that
D That is accepted
The orbits of planets around the Sun, or of satellites around the Earth, can be ________
A Circular and elliptic
B Circular and hyperbolic
C Elliptic and parabolic
D Parabolic and hyperbolic
What is the total number of planets move around the Sun?
A Five
B Eight
C Seven
D Six
To tell a lie is great sin. We_die than tell a lie.
A have hetter
B would rather
C should
D have to
Two circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?
A 1
B 2
C 3
D 4
There is no reason to rule out the possibility of the life on Uranus, we must then undertake the exploration of the planet, The argument assumes that-----.
A Life exists on Uranus
B Uranus is the only other planet in the solar system capable of supporting life.
C Search for life is sufficient motive for space exploration
D Uranian life would be readily recognizable as life
Neptune is an extremely cold planet;-----Uranus.
A so does
B so has
C so is
D it is

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