高二英语教案：第十单元重、难点问答

　　1. How does nature form a danger to people in the world and how can science help reduce that threat?

　　[问] reduce的主要用法有哪些?

　　[答] reduce意为\"把......减少\"、\"降低(价格)\"、\"缩小(程度、尺寸等)\"，是及物动词。例如：

　　She reduced her weight by 6 kilograms. 她的体重减轻了6公斤。

　　The bike was reduced from 300 yuan to 200 yuan. 这辆自行车的价格从300元降到200元。

　　You must reduce your expenses. 你必须减少你的开支。

　　reduce还表示\"使成为\"、\"使处于(某种状态)\"，多用于被动语态，且与介词to连用。例如：

　　The house was reduced to ashes. 房子被烧成灰烬。

　　In the past, she was reduced to begging. 在过去，她被逼得去讨饭。

　　2. Some people got into a total panic, when the typhoon pulled the roofs off their houses and cars went up in the air.

　　[问] get into a panic表示什么意思?

　　[答] get into a panic意为\"进入恐慌状态\"，是固定搭配，可与about连用，引出原因。例如：

　　They got into a panic about the fire in the building. 他们因大楼起火而变得慌乱起来。

　　He got into a panic when he thought he\'d forgotten the passport. 他想起忘了带护照时，惊慌起来。

　　3. The sight of it awoke the scientist in my uncle to go and see it from closer at hand.

　　[问] at hand能用by hand替代吗?

　　[答] 不能。 at hand意为\"在近处\"，是介词短语，而by hand则表示\"用手\"。例如：

　　We live close at hand. 我们住在附近。

　　Fortunately there was someone at hand. 幸好附近有人。

　　This desk was made by hand. 这张桌子是手工制作的。

　　at hand还表示\"在手边\"、\"即将来到\"，作状语或表语。