因含马兜铃酸，不宜过量或长期服用的是（） A.桑寄生 B.木香 C.柿蒂 D.青木香

根据下面短文的内容判断下列句子的正误，正确的用“A”表示，错误 的用“B”表示。

    Pearl S．Buck (赛珍珠·巴克) was a very popular American writer of her day. She was famous

for her books about China. Pearl S.Buck was awarded the Nobel Prize for Literature (诺贝尔文学奖)

in 1938. The writer was born in West Virginia, America. She spent almost half of her long life in China.

Her youth was spent in Jiangsu Province, China. She learned to speak Chinese before she could speak

English. Her mother had traveled widely in her youth and liked literature very much. After being educated

by her mother and by a Chinese teacher, Pearl S. Buck went to school in Shanghai at the age of fifteen.

She continued her education in the United States at a Woman's College to study psychology (心理学).

After graduating in 1914, she returned to China as a teacher. In the 1920s her family moved to Nanjing.

There she taught English and American literature at a university. As a writer, Buck's book, The Good Earth,

appeared in 1931 and sold quite well in its first year. It has been translated into over thirty languages.

In 1938 she became the third American to win the Nobel Prize for Literature. By the time of her death,

Pearl had published (出版) more than seventy books. Pearl S.Buck died in March, 1973, just two months

before her 81^st birthday.

(      )1. Before she went to school in Shanghai, Pearl S.Buck studied all by herself.

(      )2. Pearl S.Buck was known to many people for her books about China．

(      )3. In 1914, Pearl S.Buck worked as a literature teacher at.a university in Nanjing.

(      )4. Pearl S.Buck went to study literature at a Woman's College in America.

(      )5. Pearl S.Buck won the Nobel Prize for Literature in 1938 and published over seventy books in her life.

可降低聚合物驱油效率的是（）。

A、提高聚合物浓度

B、降低聚合物浓度

C、提高聚合物相对分子质量

D、pH值

假设投资者的投资范围仅限于资本市场，且该市场是有效的，如果把货币市场基金视为无风险资产，试根据共同基金定理，分析在上述假设前提下，投资者是如何选择投资组合的。

男性，31岁。转移性右下腹痛24小时，伴恶心、呕吐、发热。查体：T38．5℃，P88次/分。右下腹压痛、反跳痛、肌紧张。血白细胞13×10⁹/L，中性比86％。尿常规白细胞1～2/HP，红细胞2～3/HP。

该患者最可能的诊断是（）

A.急性胆囊炎

B.消化性溃疡穿孔

C.肠系膜淋巴结炎

D.急性化脓性阑尾炎

E.右输尿管结石

当电源接通时，起动机上的电池续电器的动作，推出（）与（）而使发动机起动。