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问题 单项选择题

分泌胃液中H+的细胞是

A．孕激素
B．人绒毛膜促性腺激素
C．雄激素
D．促性腺激素释放激素
E．促卵泡激素释放蛋白

答案

参考答案：A

解析：[解题思路] 胃的壁细胞能分泌胃酸和内因子，故胃液中H+来自于胃壁细胞。

单项选择题

汇编语言源程序经汇编后不能直接生成的文件类型是()。

A．OBJ文件

B．LST文件

C．CBF文件

D．EXE文件
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单项选择题

DOM is a platform- and language- (65) API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented (66) . DOM is a (67) -based API to documents, which requires the whole document to be represented in (68) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (69) documents that do not fit into the memory available for processing.

68（）

A.document 

B.processor 

C.disc 

D.memory
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