Now a paper argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars.
A: configuration
B: constitution
C: condemnation
D: contamination
A: configuration
B: constitution
C: condemnation
D: contamination
举一反三
- He was an early _______ of the theory that life on Earth may have come from Mars.
- Why is the second theory sometimes referred to as the Mars Theory A: Earth's moon used to orbit Mars. B: Mars was captured by the gravitational field of the Sun, C: A planet the size of Mars collided with Earth. D: Mars is larger than Eart
- Organic chemicals mainly come from oil, natural gas, and . A: metal B: air C: water D: coal
- There are often ( fewer / more ) unhealthy chemicals in bottled water than in tap water. These chemicals come from the plastic in the bottles.
- The rock was slippery as a ball, and they had to rather than climb.