设a是最小的自然数，b是最大的负整数的相反数，c是绝对值最小的有理数，则a+b+c的值为[ ]
A．2
B．1
C．0
D．﹣1
答案：B
_____ the fact that his initial (开始的) experiments had failed, Pro. White persisted (坚持) in his research. [ ]
A. Because of
B. As to
C. In spite of
D. In views of
防止燃煤产生的大气污染的法律措施？
