some of the equipment in our lab ( ) introduced from shanghai,and the rest ( )bought in our city答案:was was 为什么都是单数?

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some of the equipment in our lab ( ) introduced from shanghai,and the rest ( )bought in our city
答案:was was 为什么都是单数?

这是因为主语指的是“设备"(equipment)",此词在英语中是不可数名词,所以谓语用单数was
后面的The rest "其余的”指的也是equipment