软体动物的外套膜由外层上皮、()和内层上皮组成。由外层上皮分泌贝壳,()具纤毛,纤毛摆动,造成水流。
参考答案:结缔组织;内层上皮细胞
简述票据贴现交易背景资料的审核要点?
As time went by, he began making 1________. He grew more and more popular as his 2________ character, the little tramp, became known 3________ the world. The tramp, a poor, 4________ man with a moustache, 5________ large trousers, worn-out shoes and a small round black hat. He walked around stiffly carrying a walking 6________. This character was a social 7________ but was loved for his optimism and determination to 8________ all difficulties. He was the 9________ who was kind even 10________ others were unkind to him.
课文内容填空答案填写处(答在其他地方无效):
小题1:______________ 小题2:______________ 小题3:______________ 小题4:_______________
小题5:______________ 小题6:_____________ 小题7:_____________小题8:_______________
小题9:______________ 小题10:_____________