Ⅰ.单词拼写
根据汉语或首字母提示，写出下列单词
1．As is known, metals expand (膨胀)with heat and contract(收缩) as they cool.
2．Why does it cost so much? I think it's just an ordinary(普通的)cell phone.
3．The conference marked an important stage(阶段) in the two countries' relationship.
4．Ice and snow are different forms of the same substance(物质)—water.
5．One of Mr Li's aims(目标)is to finish writing two books before going abroad.
6．What conclusion have you drawn from the facts? Please tell me at once.
7．We are proud of having all the latest equipment in our chemistry lab.
8．“What is his reaction to our plan？” he asked after the meeting.
9．How to use electricity safely has become general knowledge in the village.
10．Water can have three states: liquid, solid and gas.
