航天技术是一个国家现代技术综合发展水平的重要标志。
参考答案：对
I refuse to accept the blame for something ________ was someone else's fault.[ ]
A. who
B. that
C. as
D. what
下列工种中，哪一工种易患全身性振动病
A．铆工B．拖拉机手C．砂轮工D．电锯工E．风铲工
