资料和档案的划分,可以直接以其物质形态或具体内容作为标准。
参考答案:错
The first English novel _____ I read was "Gone with the Wind".[ ]
A. which
B. that
C. who
D. whom
安全电压是指保证不会对人体产生致命危险的电压值,工业中使用的安全电压是多少以下?()
A.25V
B.36V
C.50V
D.110V