【单选题】本题考查的是软体动物的主要特征。在生殖发育方面的主要特征为( )
【简答题】短文改错。 I'd love to telling you something about my vacation. I've been looking forward to visit the East Lake for a long time. Yesterday, with my friends, I paid a visit it. We set off at 7:00 am by bus...
【单选题】You have spent 200 dollars treating a client to a business meal in the United States, the most appropriate tip should be:
【简答题】软体动物的主要特征是柔软的身体表面有 ,体外大多具有贝壳,对身体有很好的保护作用。运动器官是 。(2分)
【简答题】软体动物的主要特征是:柔软的身体表面有__________________,大多数具有___________________,运动器官是_______。