开头句型
I....has both advantages and
disadvantages.……既有利又有弊。例如：
1.Obviously television has both advantages and disadvantages.
2.Living in a city has both advantages and disadvantages.
3.Com pared with cars，bikes have their advantages and disadvantages.
举一反三：
1.Although computers bring people a lot of convenience，they have many
disadvantages.
2....has many advantages.For example，...However，just as every
coin has two sides，...has its
disadvantages.(本例将利弊分开讲，转折过渡自然。just as every coin has two sides也很值得背诵。)
