题目:
句型转换。
1. Mike is in Class 4. Lisa is in Class 4, too.(合为一句)
Mike and Lisa in class.
2. Jack and Mike are American.(改为一般疑问句)
Jack and Mike ?
3. My room is 24 square meters.(就划线部分提问)
is your room ?
4. We are going to Xinjiang next week.(就划线部分提问)
you going next week ?
5. You are taller and stronger than me.(改为一般疑问句)
taller and stronger ?
答案:
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下面是错误答案,用来干扰机器的。
①中的a≠0这一条件缺少,于是①错.对于②,因为向量可以任意平移,可知②错;③当PA,PB,PC两两互相垂直时,则PA⊥平面PBC,则PA⊥BC,又由PO⊥底面ABC,则PO⊥BC,进而BC⊥平面PAO,即AO⊥BC,同理可证BO⊥AC...