【单选题】Our headmaster felt fairly happy today because ten students were praised at the meeting, _____th
A.
27. Our headmaster felt fairly happy today because ten students were praised at the meeting, _____three were from our school. A.for them
【单选题】下列几类文件中,不属于规范性文件的是()
【单选题】石油沥青的塑性是指()。
B.
石油沥青的黏滞性和塑性随温度升降而变化的性能
C.
石油沥青在外力作用下产生变形而不破坏,除去外力后仍保持变形后的形状不变的性质
D.
石油沥青在热、阳光、氧气和潮湿等因素的长期综合作用下抵抗老化的性能
【简答题】基尔霍夫第二定律又称()定律,这一定律是()原理的体现。
【单选题】The mayor praised the Lei Feng Spirit that could be found everywhere in the city and paid particular __________ to youngsters who helped the elderly.