赤道不穿过的大洲是[ ] A、亚洲 B、非洲 C、大洋洲 D、南美洲

题型:选择题

问题:

赤道不穿过的大洲是[ ]

A、亚洲

B、非洲

C、大洋洲

D、南美洲

考点:大洲,大洋
题型:选择题

Ig恒定区的特点是()

A.机体内Ig恒定区的氨基酸种类与排列顺序是相同的

B.同一种属动物中,同一类别Ig分子其C区氨基酸组成及排列顺序比较恒定

C.同一种属动物的H链氨基酸种类及排列顺序比较恒定

D.同一种属动物的L链氨基酸种类及排列顺序比较恒定

E.以上都不是

题型:选择题

阅读理解。

                                          Brave Frenchman Found Half-way Around the World

     (NEW YORK) A French tourist highly praised for rescuing a two-year-old girl in Manhattan said he didn't

think twice before diving into the freezing East River.

     Tuesday's Daily News said 29-year who left the spot quickly after the rescue last Saturday.

     He lifted the little girl out of the water after she fell off the bank at the South Street Seaport museum. He

handed the girl to her father, David Anderson, who had dive in after him.

     "I didn't think at all," Duret told the Daily News. "It happened very fast. I reacted very fast."

     Duret, an engineer on vacation,was walking with his girlfriend along the pier (码头) when he saw something

falling into the water.He thought it was a doll, but realized it was a child when he approached the river. In an

instant,he took off his coat and jumped into the water.

     When he reached the girl, she appeared lifeless, he said. Fortunately, when she was out of the water, she

opened her eyes.

     Anderson said his daughter slipped off the bank when he was adjusting his camera. An ambulance came

later for her, said Duret, who was handed dry clothes from cookers. Duret caught a train with his girlfriend

shortly after.

     The rescue happened on the day before he left for France. Duret said he didn't realize his tale of heroism

he was leaving the next morning. "I don't really think I'm a hero," said Duret. "Anyone would do the same ting."

1. Why was Duret in New York? 

A. To meet his girlfriend.

B. To work as an engineer.

C. To spend his holiday.

D. To visit the Andersons.

2. What did Duret do shortly after the ambulance came?

A. He was interviewed by a newspaper

B. He asked his girlfriend for his dry clothes

C. He went to the hospital in the ambulance

D. He disappeared from the spot quickly

3. Who divide after Duret into the river to save the little girl?

A. David Anderson

B. A passer-by

C. His girlfriend

D. A taxi driver.

4. When was duet most probably found to be the very hero? 

A. The day when he was leaving for home.

B. A couple of days after the girl was rescued.

C. The first day when he was in New York.

D. The same day when he was interviewed.

题型:选择题

下列哪项不符合慢粒急变()

A.脾脏进行性肿大

B.抗生素治疗无效的高热

C.Ph染色体转阴

D.骨髓中原粒及早幼粒细胞>30%

E.化疗无效

题型:选择题

葡萄胎是()

A.良性肿瘤

B.恶性肿瘤

C.癌前病变

D.交界性肿瘤

E.良性病变

题型:选择题

截止阀的特点是什么?

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