在金属容器内及狭窄场所从事焊接作业，必须采取通风措施，防止作业人员（）中毒。
参考答案：气体
The parents of a 4-year-old with sickle cell anemia tell the nurse that they would like to have other children, but they’re concerned about passing sickle cell anemia on to them. Which health care team member would be the most appropriate person for the nurse to refer them to
A. Clergy.B. Social worker.C. Certified nurse midwife.D. Genetic counselor.
信息化战争是信息时代（）在战争领域的客观反映。
A.经济
B.科技
C.生产力水平
D.生产方式
