下列关于名著的表述，不正确的一项是（      ）

如图所示，A、B、C、D是匀强电场中一正方形的四个顶点，已知A、B、C三点的电势分别为φ_A=30V，φB=6V，φ_C=﹣6V，由此可得D点电势φ_D=____V．

列宁说： “我们在夺取政权的时候便知道，不存在将资本主义制度具体改造成社会主义的既存方法，……我们必须根据实践做出判断。”苏联在社会主义建设中做出的探索有（   ）
①走城市夺取政权的道路 ②实行新经济政策③实行高度集中的政治经济政策 ④建立社会主义市场经济体制

    When you stay away form your home for a long time, you start to miss your good bed, your good parents. Believe it or not, you're feeling homesick. You can help yourself to feel less homesick. Here's how:

      ⑴   .If you're going away from home, bring your favourite clothes, you can also bring some pictures of the people who you may miss. You can look at them any time you want.

       ⑵   .The busier you are, the less time you'll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities whenever you are.

       ⑶   .You can make a plan for when you'll call your mom or dad. You can also keep in touch with family and friends by email or text messages.

       ⑷   .Sometimes, telling someone that you're feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.