问题
单项选择题
三相变压器铭牌上所标的容量是指变压器的三相额定()。
A.有功功率
B.视在功率
C.无功功率
D.都不是
答案
参考答案:B
三相变压器铭牌上所标的容量是指变压器的三相额定()。
A.有功功率
B.视在功率
C.无功功率
D.都不是
参考答案:B
选择适当的词组填空。根据所提供的语景,从方框中选择正确的短语填空完成句子: | |
2. The pilot, whether _____or design, made the plane do a sharp turn. 3. The library was built ______ the scientist. 4. As they don't have enough gas, they have decided to ______gas supplies to other cities. 5. The good news _________ whoever heard it. 6. -I wonder if I could use your dictionary. -Sure, _____. 7. He _________ making everybody around him happy. 8. On Halloween, children would _____ and go door to door asking for treats or playing tricks. |