【单选题】Choose the best answer to the following question. His explanation has ________ this mystery and helped us to understand better.
【单选题】This story of the development of a gunshot-locating system shows ______.
A.
scientific development can greatly enrich people's life.
B.
scientific concepts are too abstract for people to understand.
C.
scientific knowledge is a great stimulus to economic development.
D.
scientific research in one field can aid society in an unrelated area.
【简答题】His car broke ______, so he has a plausible explanation as to why he is late.
【单选题】The passage is mainly about _______
A.
the characteristics of American newspapers
B.
the development of American newspapers
C.
the functions of American newspapers
D.
the merits and shortcomings of American newspapers
【单选题】His car broke ______, so he has a plausible explanation as to why he is late.
【单选题】按材料在建筑物中的功能可将建筑材料划分分类中错误的是 ( )
【单选题】Choose the best answer to the following question. 14) His explanation has ________ this mystery and helped us to understand better.
【单选题】建筑物防雷分类是按照建筑物的重要性、生产性质、遭受雷击的可能性和严重性进行的。在建筑物防雷类别的划分中,电石库应划分为______防雷建筑物。