正确答案: C

9种

题目：18-3．分子式为C5H10O2的酯共有(不考虑立体异构) ：

解析：C

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[单选题]_____________________________________________________________________________If you prefer using the dictionary on a computer, you can obtain CD-ROM versions of many major dictionaries. In addition, you can access numerous dictionaries, such as WWWebster’s Dictionary, on the Internet. Online dictionaries allow you to enter a search word (you even get help with spelling) to see a definition, and sometimes even an illustration. Online dictionaries also offer additional features, such as word games, language tips, and amusing facts about words. Some online dictionary services allow you to access numerous dictionaries, both general and specialized, in one search.

Accessing dictionaries electronically

[单选题]花药的药室内壁即是( )。

纤维层

[单选题]How does eBay make money from its website7?

By charging for each sale

[单选题]—Why do you want to work for our company?

—This is the job that I for.

have been looking

[多选题]西藏自治区历任人民代表常务委员会主任和人民政府主席都是由藏族公民担任。目前，在自治区四级人大代表中，藏族和其他少数民族占94%以上，在自治区各级国家机关组成人员中，藏族和其他少数民族占77.97%。这说明

我国少数民族依法享有管理民族内部事务的权利

我国认真贯彻民族区域自治制度

[单选题]

in

[单选题]次生菌丝是指菌丝的每个细胞中均具双核，它在子囊菌和担子菌的生活史中都占主要地位。( )

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