3. ________ lies at the center of the earth. A. Metal B. Hard rock C. A ball of hard metal D. Hot liquid rock
A: 答案A
B: 答案B
C: 答案C
D: 答案D
A: 答案A
B: 答案B
C: 答案C
D: 答案D
举一反三
- ________lies at the center of the earth. A: Metal B: Hard rock C: A ball of hard metal D: Hot liquid rock
- Hard as the metal is, it can be changed into liquid at high temperatures.
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