[单项选择]对不同强度的混凝土试块，在相同条件下测出的应力应变曲线可以看出（）。
A. 曲线的峰值越高，下降段越陡，延性越好
B. 曲线的峰值越高，下降段越缓，延性越好

Leo Tolstoy was a Russian writer and moral philosopher, and one of the world’s greatest novelists. He was born on April 30,1828 and died on Feb. 14, 1910. His writings (1) influenced much of 20th-century literature, and his moral (2) helped shape the thinking of several important (3) and political leaders.
Leo Nikolayevich Tolstoy was born (4) a family of noble landowners at his family (5) south of Moscow. His early education came from tutors at home, but after the deaths of his parents in the 1830s, he was (6) by relatives. He entered Kazan’ University when he was 16 but preferred to educate himself independently, and in 1847 he (7) his studies without finishing his degree. His next 15 years were very (8) . Tolstoy returned to manage the family estate, with the determination to improve himself (9) and physically. Alter less than two years, however, he abandoned rural life (10)
A. for
B. with
C. beyond
D. over