【简答题】请分别画出单相电子式电能表接线图、三相四线电能表接线图、三相三线电子式电能表接线图。
【单选题】听对话,回答问题。 What did the boy do last weekend? [ ]
A.
Did his homework and helped his father sell clothes.
B.
Went to a piano lesson and played soccer.
C.
Helped his sister study English and did his homework. v
【单选题】This poor boy was treated so ___ by his stepmother that we all helped him.
【单选题】Lucy , a _______ girl , helped the little boy find his parents. [ ]
【单选题】某班 3名学生统计学考试成绩分别为:65分、85分、91分,这3个数字是( )。
【简答题】The boy helped his grandpa _____(扫) the floor.
【单选题】They helped the boy __his bike yesrerday.
【简答题】立式圆筒形钢油罐分类多以罐顶结构命名,其中目前最常见的是 、 和 。