关于亚洲地形特点的叙述，正确的是（ ）
A：以平原为主
B：地势中部高耸，四周较为低下
C：地面起伏较小
D：为海拔最高的洲
Situations
Differences
Britons (英国人)
Americans
When being knocked into
They will say “sorry” before the other does.
They will ____ the person and expect him to say “sorry”.
When going out for dinner
They will ____ when going out for dinner.
They may wear a normal shirt to go to a good____.
When taking a taxi
They will give an address to the taxi driver and then ____.
They will ____ the taxi driver all the time.
“神舟五号”的成功发射与回收，表明我国的载人航天技术已经进入世界领先水平。在飞船的火箭推进器中常装有液态肼（用X表示）和过氧化氢（H2O2），它们混合时的反应方程式为：2H2O2＋X＝N2↑＋4H2O，则肼（X）的化学式为（ ）
下列现象中，属于“文化大革命”中常见的是（ ）
①“共产风”②批斗会 ③大字报 ④土法炼钢 ⑤破四旧
解释《卜算子 咏梅》中带线的字。
犹：____ 俏：____
