思想政治工作()
A是中国特色社会主义建设的首要任务
B是经济工作和其他一切工作的生命线
C是改革开放正确方向的保障
D是中国共产党和我们国家重要的政治优势
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文化的产生和发展都有一定的独立性，不依赖于自身的积累。()
The label required on containers carrying barium oxide for international shipment must read ______．
A. Radioactive material
B. Spontaneously combustible
C. Keep away from food
D. Biomedical material
In ice of higher concentrations ______ is not one of the basic applying rules．
A. keep moving
B. try to work with the ice movement，and not against it
C. excessive speed means ice damage
D. use full astern as often as possible
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