[单选题]接地线应用多股软裸铜线,其截面不得小于( )m㎡。
A.10
B.16
C.25
D.35

Although Beethoven could sit down and compose easily, his really great compositions did not come easily at all. They cost him a great deal of hard work and he always found it hard to satisfy himself.
When he was 28, he began to notice a strange noise in his ears. As it grew worse, he went to see doctors, and was told that he was going deaf. This was too much for any{{U}} (36) {{/U}}to bear. Beethoven was in{{U}} (37) {{/U}}; he was sure that he was going to die. He went to the countryside where he wrote a long{{U}} (38) {{/U}}letter to his brothers, {{U}} (39) {{/U}}how sad and lonely his deafness made him. He{{U}} (40) {{/U}}to die, and said to death, "Come when you will, I shall meet you bravely."
In fact, Beethoven did something braver than dying. He{{U}} (41) {{/U}}his courage and went on writing music, though he could hear what he wrote more and more{{U}} (42) {{/U}}. He wrote the music for which we remember him