临床疑诊自发性气胸病人，应首选的检查方法是
A．纤维支气管镜B．胸部CTC．胸部X线D．磁共振成像E．动脉血气分析
参考答案：C
A teacher’s ________ to education is worth great respect of the whole society because it brings benefits to the development of society.
A．guidance
B．principle
C．identity
D．devotion
小明走560米用了7分，每分走（ ）米。
