一个矩形线圈在匀强磁场中转动产生交流电，其瞬时值表达式为e=220 $\sqrt{2}$ sin10πt伏，下列叙述中不正确的是（   ）

It's difficult to make your dream come true          you can live bravely, excitingly and imaginatively.

曲线y＝x³－3x²＋1在点(1，－1)处的切线方程为(　　)

读一读，把正确答案的代码填入相应的括号里。

①What can you do?____    A. Thank you.

②What can Sam do?____   B. I can draw.

③A gift for you, Linda.____ C. He can ride a bicycle.

④Where's the wolf?____     D. Ha!Ha! No wolves.