电动机绕组上积有灰尘会()和()。
参考答案:降低绝缘;影响散热
The Shanghai Expo has attracted more than 73 million tourists, ______ it the most successful in history.
A. making B. makes C. made D to make
借款合同中对货币种类的要求是()。
A、一般可以写明货币种类
B、无需写明货币种类
C、必须写明货币种类
D、依当事人约定