题目

 情景对话。从B栏中找出与A栏句子相应的答语。            A                                                        B1.When did he lose them?               A. A farm.2.Where did she go last weekend?  B. No, I didn’t.3. Did you go to the zoo?               C. Yes, there are some carrots.4. Are there any vegetables?          D. Yes, we can.5.Can we wear a hat in class?         E. It was yesterday.掌握化学用语是学好化学的关键，下列化学用语与含义不相符的是（   ）。A．Na+——钠离子B．CuO——氧化铜C．2H ——2个氢元素　D．Mg(+2)O——氧化镁中镁元素化合价为+2价