工业窑炉中可燃混合物的燃烧都是用点火的方法来引燃的。()
In paragraph 2, the "impossibly difficult challenge" probably refers to______.
A. abiding by the rules laid down in the Kyoto Protocol
B. achieving the goals stated in the Kyoto Protocol
C. keeping with and maintaining the spirit of the Kyoto Protocol
D. achieving emissions standard reductions in the short span of time allowed in the Kyoto Protocol
Which of the following will the author most probably agree？
A. The governors of Poland are aware of the importance of education.
B. Poles have been inclined to obey rather than resist.
C. Poland"s economy has been stuck in stagnancy since 1990s.
D. Poles haven"t figured out the purpose of education in science.
应对煤气工作人员进行安全技术培训，经考试合格的人员方可上岗工作，以后每两年进行一次复审。()
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