识字的三套工具是() ["汉语拼音","汉字的基础知识","查词典的知识","查字典的知识"]
什么原因使运行中的TA发生不正常音响?
A coastal current(). ["is generated by waves striking the beach","flows outside the surf zone","flows in a circular pattern","is also known as a longshore current"]
《商标印制管理办法》自()起施行。 ["2002年1月1日","2003年9月1日","2004年9月1日","2004年12月1日"]
A backlash below a lock is defined as(). ["a current setting your vessel on the wall","a current setting into the lock chamber","an eddy working along the lower guide wall","a current setting counterclockwise"]
试列举球果、蒴果、荚果、翅果、坚果、肉质果类树种各一例,说明其种子的调制方法。