我国公路自然区划的一级区划是按自然气候、全国轮廓性、地理、地貌、各地方的年降雨量划分的。()

未分类题It can be inferred that cracking the genetic code and conquering cancer are related becauseA．the latter can be achieved based on the knowledge of the former.B．the latter can prove the existence of the former.C．the former reverses the process of the latter.D．the former generates the therapeutic viruses for the latter.

未分类题According to the passage, the aging process is a struggle betweenA．destruction and repair.B．damage and control.C．control and reverse.D．repair and reverse.

判断题护面墙除承受自重外，不能承受墙背土压力。()

未分类题The author uses the result of Gallup poll to argue thatA．the first ladies in America are respected by the whole nation.B．Rosalynn is not as good as Nancy Reagan in the 1980s.C．Gallup poll is an effective organization to collect public opinions.D．today's famous people are created for their well-knowness.

判断题励磁绕组断线的他励直流电动机，额定负载起动时，将出现电流过大情况。()