简述散打科研的步骤?
参考答案:
①选择课题;
②研究设计;
③搜集资料;
④整理资料;
⑤分析资料;
⑥结果验证;
⑦撰写论文。
家兔牙齿分化为门齿、犬齿和臼齿,有发达的盲肠,这与它们吃植物的生活习性相适应。[ ]
—What would you send to your sister as the Christmas gift?
—I haven't decided yet .I _ send her a handbag. [ ]
A. shall
B. may
C. must