某羧酸的衍生物A的分子式为C6H12O2,已知又知D不与Na2CO3溶液反应,C

题型:选择题

问题:

某羧酸的衍生物A的分子式为C6H12O2,已知又知D不与Na2CO3溶液反应,C和E都不能发生银镜反应,则A的结构可能有[ ]

A.1种

B.2种

C.3种

D.4种

考点:有机物的推断
题型:选择题

Last Thursday, a young woman saved an elderly man from a burning house on Garden Road. The young woman’s name is Kitty and she works in a clothes shop. The elderly man, Daniel, lives just opposite the clothes shop. On Thursday afternoon, Kitty looked out of the window. She saw some smoke coming from Daniel’s house and rushed over to see what was happening. The house was on fire and Daniel was inside. Kitty quickly called the fireman on 999. Then, she ran into the house to save Daniel. She found Daniel in his bedroom and he was frightened. Kitty helped Daniel out to a safe place. Five minutes later the fireman arrived and they put out the fire. No one was hurt.

The next day, Daniel said,“I am so grateful to Kitty. She saved my life.”Daniel also said,“In the future, I will be more careful. I don’t want another fire in my house.”

小题1:Kitty saved _______ from a burning house.

A.a young man

B.an old woman

C.an old man

D.a young woman小题2:The number to call the firemen in the story is__________.

A.eight nine nine

B.one one nine

C.nine eight eight

D.nine nine nine小题3: ________ was(were) hurt in the fire.

A.No one

B.Two people

C.Four people

D.Seven people小题4:. In the future, Daniel will be more_________.

A.grateful

B.carefully

C.careful

D.frightened

题型:选择题

按基础资产分类,衍生品业务不包括( )。

A.利率衍生品

B.汇率衍生品

C.信用衍生品

D.现金类衍生品

题型:选择题

朗格汉斯细胞中的特征性结构是()

A.birbeck颗粒

B.角质小体

C.透明角质颗粒

D.黑素小体

E.桥粒

题型:选择题

中国工程咨询协会在( )年成为国际咨询工程师联合会(FIDIC)正式成员。

A.1997

B.1996

C.1995

D.1994

题型:选择题

在指定分包中,分包商一般由谁指定?()

A、业主

B、监理工程师

C、承包商

D、交通主管部门

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