Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice. A: ①, ②； B: ②, ④； C: ①, ②, ③, ④. D: --
Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice. A: ①, ②； B: ②, ④； C: ①, ②, ③, ④. D: --
中国大学MOOC: Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice.
中国大学MOOC: Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice.
The ability of coal to release a combustible gas has long been known. A: submit B: emit C: admit D: permit
The ability of coal to release a combustible gas has long been known. A: submit B: emit C: admit D: permit
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