There are different forms of energy, _____ come from the sun.
There are different forms of energy, \_\_\_\__ come from the sun.
因此
There are not _____ students in Class One as in Class Two.
There are not \_\_\_\__ students in Class One as in Class Two.
____g H2S和2.8g N2所含的原子数目相同；质量相同的H2、Cl2、SO2中所含分子数最多的是____，标准状况下体积最小的是____．
\_\_\_\_g H2S和2.8g N2所含的原子数目相同；质量相同的H2、Cl2、SO2中所含分子数最多的是\_\_\_\_，标准状况下体积最小的是\_\_\_\_．