查询 genbank accession number
include/linux/major.h 此文件说了如何定义linux系统中各个设备的表示方式. #define MAX_BLKDEV 32 /* * assignments * * devices are as follows (same as minix, so we can use the minix fs): * * character block comments * -------------------- -------------------- -------------------- * 0 - unnamed unnamed minor 0 = true nodev...
by 怪怪虎 - Linux文档专区 - 2010-01-18 16:20:44 阅读（666） 回复（0）
atof（将字符串转换成浮点型数） 相关函数 atoi，atol，strtod，strtol，strtoul 表头文件 #include 定义函数 double atof(const char *nptr); 函数说明 atof()会扫描参数nptr字符串，跳过前面的空格字符，直到遇上数字或正负符号才开始做转换，而再遇到非数字或字符串结束时('')才结束转换，并将结果返回。参数nptr字符串可包含正负号、小数点或E(e)来表示指数部分，如123.456或123e-2。 返回值...
A port number is a way to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server . For the Transmission Control Protocol and the User Datagram Protocol , a port number is a 16- bit integer that is put in the header appended to a message unit. This port number is passed logically between client and server transport layers ...
select (to_number('2005') - 1) as valuea from dual select ('2005' - 1) as valuea from dual 以上两句本质的区别是什么？效率是否相同？ 我的理解是当‘2005’ 没有被显示转型的话，oracle会自动转型，但效率是否会不同？ 3Q！！！！
