[单选题]内攻人员乘坐消防电梯登高时,要停靠在( )着火层下两层,严禁停靠着火层或穿越着火层。【单选题】
A. 着火层
B. 着火层上一层
C. 着火层下一层
D. 着火层下两层

Ending a marriage can be a sad{{U}} (1) {{/U}}experience, especially for children. In the United States, the number of children{{U}} (2) {{/U}}grows by about one-million each year. As the number increases, experts continue to{{U}} (3) {{/U}}of divorce on children.
Some experts say divorce is{{U}} (4) {{/U}}. Some studies show that children of divorce have more problems. For example, some children of divorce are more often{{U}} (5) {{/U}}toward parents and teachers. They have{{U}} (6) {{/U}}of leaving school before completing their studies. They have more{{U}} (7) {{/U}}. However, experts note that these problems are not necessarily caused by divorce alone.
During the 1970s, many Americans believed that divorce was{{U}} (8) {{/U}}for married people who were not happy. People did not think divorce would harm children. They thought children would{{U}} (9) {{/U}}a period of change when their parents ended their marri