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【单选题】
下列各项中,属于非系统风险的是
A.
中央银行提高存款利率
B.
国家采取货币紧缩政策
C.
被投资公司在市场中竞争失败
D.
通货膨胀
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参考答案:
举一反三
【简答题】第三节:阅读理解(共15小题;每小题2分,满分30分) (A) JIUQUAN, Gansu Province, Sept. 6(Xinhua) ---- China’s manned spacecraft Shenzhou-7 will be launched at an appropriate time between Sept. 25 and 30 from the Jiuquan Sate...
【单选题】在用反相HPLC法分离测定B族维生素时,常加入己烷磺酸钠,其目的是
A.
调节溶液的pH,使样品充分游离
B.
与B族维生素反应,生成离子对,易于被色谱柱保留
C.
防止样品被氧化
D.
络合样品中微量的金属离子
E.
提高分离度
【单选题】已知αAB=30°,则αBA=【】。
A.
30°
B.
150°
C.
210°
D.
330°
【单选题】在用反相HPLC法分离测定B族维生素时,常加入已烷磺酸钠,其目的是()
A.
调节溶液的 pH 值,使样品充分游离
B.
与样品离子反应生成离子对,改善色谱行为
C.
防止样品被氧化
D.
络合样品中微量的金属离子
E.
抑抑制B族维生素电离
【单选题】在用反相HPLC法分离测定B族维生素时,常加入己烷磺酸钠,其目的是()
A.
调节溶液PH,使样品充分游离
B.
与B族维生素反应,生成离子对,易于被色谱柱保留
C.
防止样品被氧化
D.
络合样品中的为量的金属离子
E.
提高分离度
【单选题】听力原文: In a statement, President Bush says he is taking the action, because the conflict in Darfur threatens the national security and foreign policy of the United States. The asset freeze is being imp...
A.
The asset freeze is being imposed on four Sudanese.
B.
The conflict in Darfur threatens the national security and foreign policy of the United States.
C.
Rallies axe planned in Washington and throughout the US to protest the four-year war in Darfur.
D.
George Clooney just returned from a trip to the Darfur region.
【单选题】在用反相HPLC法分离测定B族维生素时,常加入己烷磺酸钠,其目的是( )
A.
调节溶液PH,使样品充分游离
B.
与B族维生素反应,生成离子对,易于被色谱柱保留
C.
防止样品被氧化
D.
络合样品中的为量的金属离子
【单选题】Examples of property include bonds, shares, copyrights, and patents.
A.
incapable
B.
intangible
C.
inappropriate
D.
integral
【单选题】This offer _______________ an Sept. 30. Your immediate reply by cable will be appreciated.
A.
extends
B.
expires
C.
includes
D.
stops
【单选题】It can be inferred from paragraph 1 that all of the following are possible examples of common property resources EXCEPT _______.
A.
wild deer
B.
water in a river
C.
trees in a forest
D.
crops on an individual’s farm
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