幼儿园学科活动中的“学科”是以（）为基础和核心的“前学科”。
A.科学概念
B.表象和初级概念
C.系统性
D.逻辑性
参考答案：B
根据句意和首字母提示补全单词。
1. Mom told me to s______ the floor twice a week.
2. Do you like doing the d______ after meals?
3. They hold a sports m______ every year.
4. Do you often go to the library to b______ books?
5. I can't go to the movies with you. I have to f______ the animals.
Dukes分期中，C1期代表（）
A.癌肿伴有系膜动脉结扎处淋巴结转移
B.癌肿已穿出深肌层
C.癌肿侵入浆膜层
D.癌肿伴有淋巴结转移
E.癌肿伴有肠旁及系膜淋巴结转移
