二、Word spelling(单词拼写)10分
1.It's _________(不必要)to spend so much money on clothes.
2.Everything has its own advantages and d_________.
3.Setting up a car factory here can help develop the e_________in this area.
4.In the 18th and 19th centuries scientists made many important _________(发现).
5.A condenser is used to collect and store e_________.
6.It usually takes four hours to get my cell phone fully c_________.
7.Do you know what material _________(传导)electricity and heat best?
8.Don't pull the cloth so hard.It _________(撕)easily.
9.How do you feel animal experiments? Do you think it c_________.
10.There is no d_________ about his honesty.
)脱去2mol氢原子转变成苯却放热，可推断苯比1，3-环己二烯 ____________（填“稳定”或“不稳定”）。