【判断题】French imports of goods and services will create a demand for foreign currency and a supply of euros.
【单选题】在永停滴定法中,若滴定过程中电流计指针从零点附近不动到发生偏转且不再回到零点,则表明
【单选题】We should divide all the potatoes ________ two piles and separated the good ones ________ the bad ones.