Work on Rome’s Palatine Hill has turned up a series of discoveries, including        might be the underground cave .

默写古诗文中的名句名篇。

读一读，判断正(T)误(F)。

   It's sunny today. Peter and his friendshave a picnic in the park. They're very happy. Peter: What do you have, Joe?

Joe: I have someapples. They are so sweet. What about you, Peter?

Peter: I havesome cakes, some biscuits and some fruit juice.

Kitty: Wow! Ihave some sweets and some bread. Would you like some bread, Alice?

Alice: Sure, Ilike bread very much. And I have a kite. Then we can fly a kite.

Peter: OK,let's have our picnic now.

Kitty: Goodidea!

氢气（H₂）、一氧化碳（CO）、辛烷（C₈H₁₈）、甲烷（CH₄）的热化学方程式分别为：
H₂(g)+1/2O₂(g)=H₂O(l)  △H=－285.8 kJ/mol
CO(g)+1/2O₂(g)=CO₂(g)  △H=－283.0 kJ/mol
C₈H₁₈(l)+25/2O₂(g)= 8CO₂(g)+9H₂O(l)  △H=－5518 kJ/mol
CH₄(g)+2O₂(g)=CO₂(g)+2H₂O(l)  △H=－890.3 kJ/mol
相同质量的H₂、CO、C₈H₁₈、CH₄完全燃烧时，放出热量最少的是               

下列每组数分别是三根木棒的长度，能用它们摆成三角形的是（  ）