胚胎期参与造血的器官有（）
A.骨髓
B.肝脏
C.胸腺
D.脾脏
E.淋巴结
参考答案：A, B, C, D, E
My brother likes math ________ chemistry. [ ]
A. as well
B. but
C. as well as
D. while
教师对教学目标、教学任务、教学材料、教学方法等内容的反思是（）
A、自我指导型反思
B、任务指向型反思
C、教学中反思
D、教学后反思
