未知题型 Which of the following is true according to the passage?A．Italians are less educated but more skilled even today.B．Many students in the training school come from Eastern countries.C．Italians are less interested in training courses traditionally.D．Traditional Cremonese style. is not popular today.

未知题型 It is suggested in the last paragraph thatA．the government profited from the Climate Group's gas emission reduction.B．energy used more efficiently will bring benefits to economy as well as nature.C．energy bills should be slashed in order to maintain a low level of gas emission.D．the Climate Group is tackling the problem through accumulating strong evidence.

判断题 样本容量的降低可以提高假设检验的统计效力。()