某铁路通过多年冻土区,路基土层为粉质黏土,相对密度d=2.72,质量密度ρ=2.0g

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问题:

某铁路通过多年冻土区,路基土层为粉质黏土,相对密度d=2.72,质量密度ρ=2.0g/cm3,冻土总含水量ω0=39%,冻土融沉后含水量ω=22%,塑限含水量ω0=19%。根据《岩土工程勘察规范》(GB50021-2001),计算该段多年冻土融沉系数δ0,并判定符合下列()融沉等级。()

A.9.7(Ⅳ)

B.12.2(Ⅳ)

C.15.5(Ⅳ)

D.24.8(Ⅴ)

考点:岩土工程专业案例岩土工程勘察岩土工程勘察题库
题型:单项选择题 案例分析题

女性,40岁。右腕关节桡侧痛渐加重,持物无力,在桡骨茎突表面压痛。要确定是否是桡骨茎突狭窄性腱鞘炎,应做下列哪项试验()

A.Thomas征

B.MCMurray征

C.Mills征

D.Finkelstein征

E.Hoffmann征

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下述哪一项是恶性肿瘤细胞的最主要形态特点()

A.多核或异形核

B.核大

C.核仁大

D.核染色浓染

E.病理性核分裂象

题型:单项选择题 案例分析题

Phyllis Wheatley is regarded as America’’s first black poet. She was born in Senegal, Africa, about 1753 and brought to America aboard a slave ship at about the age of seven. John and Susannah Wheatley bought her for three pounds at a slave auction in Boston in 1761 to be a personal servant of Mrs. Wheatley. The family had three other slaves, and all were treated with respect. Phyllis was soon accepted as one of the family, which included being raised and educated with the Wheatley’’s twin 15-year-old children, Mary and Nathaniel. At that time, most females, even from better families, could not read and write, but Mary was probably one of the best educated young women in Boston. Mary wanted to become a teacher, and in fact, it was Mary who decided to take charge of Phyllis’’s education. Phyllis soon displayed her remarkable talents. At the age of twelve she was reading the Greek and Latin classics and passages from the Bible. And eventually, Mrs. Wheatley decided Phyllis should become a Christian.At the age of thirteen Phyllis wrote her first poem. She became a Boston sensation after she wrote a poem on the death of the evangelical preacher George Whitfield in 1770. It became common practice in Boston to have "Mrs. Wheatley’’s Phyllis" read poetry in polite society. Mary married in 1771, and Phyllis later moved to the country because of poor health, as a teacher and caretaker to a farmer’’s three children. Mary had tried to interest publishers in Phyllis’’s poems but once they heard she was a Negro they weren’’t interested.Then in 1773 Phyllis went with Nathaniel, who was now a businessman, to London. It was thought that a sea voyage might improve her health. Thirty-nine of her poems were published in London as Poems on Various Subjects, Religious and Moral. It was the first book published by a black American. In 1775 Phyllis wrote a poem extolling the accomplishments of George Washington and sent it to him. He responded by praising her talents and inviting her to visit his headquarters. After both of her benefactors died in 1777, and Mary died in 1778, Phyllis was freed as a slave. She married in 1778, moved away from Boston, and had three children. But after the unhappy marriage, she moved back to Boston, and died in poverty at the age of thirty.

What does the passage mainly discuss

A.Slavery and the treatment of the black people in America.

B.The Wheatley family, including their slaves.

C.The life of America’s first black poet.

D.The achievements of Phyllis Wheatley.

题型:单项选择题 案例分析题
在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

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清收人员应对需要()的贷款,应按照依法合规、不扩大风险的原则,积极组织开展重组工作。

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