简述针管形迹相。
参考答案:
在海滩和海坪等边缘环境中,各种底栖生物挖掘各种垂直的深浅穴,这些潜穴称为“针管形”迹相。
When you think of the Internet, you probably think of ".com." Just what do those three letters at the end of a World Wide Web address mean Every computer that hosts data on the Internet has a (71) numerical address. For example, the numerical address for the White House is 198.137.240.100. But since (72) people want to remember long strings of numbers, the (73) was developed. It is a critical part of the Internet’s technical infrastructure, correlates a numerical address to a word. To (74) the White House website, you could type its numerical address into the address box of your web browser. But most people prefer to use "www.whitehouse.gov." In this case,the domain name is (75) .
(72)处填()。
A.most
B.more
C.few
D.every
非学历民办学校,是指国家机构以外的社会组织和个人利用非国家财政性经费,面向社会举办不具备颁发学历文凭资格的培训、进修、专修学院(学校、中心)。 根据上述定义,下列现象不属于“非学历民办学校”的是( )。
A.某四星级普通高校中学的分校
B.几位退休教师办的高考复习班
C.企业老总出资办了计算机培训巾心
D.某市工商联办的技能培训班