18世纪英国的一个修理工瓦特在维修“纽可门蒸汽机”的实践中吸收了别人科学和技术上的成果,发明了比“纽可门蒸汽机”效率高五倍、耗煤少1/4的“瓦特蒸汽机”,使人类进人了“蒸汽时代”。上述材料说明①实践是创新的源泉和动力②创新既需要灵感,也离不开实践 ③创新推动了社会生产力的发展④创新在推动生产力发展的同时也推动了生产关系和社会制度的变革
The Forbidden City attracts a ________ stream of visitors every day,especially during national holidays. (2013·福建,25)
If we leave right away,________ we’ll arrive on time. (2013·浙江,6)
Mary worked here as a ________ secretary and ended up getting a fulltime job with the company. (2013·浙江,2)
Tony can hardly boil an egg,still________cook dinner. (2013·新课标全国Ⅰ,25)
I think watching TV every evening is a waste of time—there are________meaningful things to do. (2013·天津,3)