【单选题】What does Charlie's father do to earn a living?
A.
He is a toothpaste cap-screwer.
【简答题】焊接不锈钢时应该根据()来选择焊条。 A.等强度原则 B.等同性原则 C.等条件原则
【判断题】三相对称负载消耗的有功功率表达式为 P=3U p I p COSφ P = U L I L cosφ P ,式中 U p 、U L 分别是相电压、线电压 (V) ;I p 、I L 分别为相电流、线电流 (A) ;φ P 是相电压与相电流之间的相位差; P是有功功率 (W)。( )
【判断题】三相对称负载消耗的有功功率表达式为 P = 3 U p I p cos P = U L I L cos P ,式中 U p 、 U L 分别是相电压、线电压 (V) ; I p 、 I L 分别为相电流、线电流 (A) ; P 是相电压与相电流之间的相位差; P 是有功功率 (W) 。( )
【简答题】Listening Comprehension. 1. How does John go to school? A. By bike. B. By bus. C. By taxi. 2. What's Charlie's problem? A. He doesn't like English. B. He finds English homework difficult. C. He can't ...
【单选题】What does 'It' in the last sentence refer to?
D.
The difference between his life and the lives of the people overhead.