Official 38 Lec 4
Question 3 of 6
What point does the professor emphasize when he mentions water and ammonia?

A.

Solid forms of water and ammonia may have contributed to the formation of the gas giants.

B.

Water and ammonia were not common substances in the outer accretion disk.

C.

Water and ammonia are pulled in by the gravity of protoplanets more readily than other substances are.

D.

Most substances found in the core of rocky planets are also found in the core of gas planets.

正确答案:A

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