![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
下列不属于专业性搜索引擎的是()
A.chemBlink
B.INFOMINE
C.eMolecules
D.Google
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_ckda.png)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_wyda.png)
- · 有3位网友选择 C,占比33.33%
- · 有3位网友选择 B,占比33.33%
- · 有3位网友选择 A,占比33.33%
A.chemBlink
B.INFOMINE
C.eMolecules
D.Google
A. "metaname=""robots""content=""nofollow"">"
B. "ahref=""signin.php""rel=""nofollow"">signin"
C. "metaname=""Baiduspider""content=""nofollow"">"
D. "metacontent=""nofollow"">"
A. http://dir.yahoo.com.cn
B. http://www.sinA.com.cn
C. http://www.baidu.com
D. http://dir.sohu.com
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