给小班幼儿投放一式多份的成品玩具材料,给大班幼儿投放丰富的半成品材料,教师贯彻的环境原则是()
A.适宜性原则
B.开放性原则
C.经济性原则
D.幼儿参与性原则
参考答案:A
— Hi, David! How was your trip to Beijing?
— Wonderful! I had never had ________ holiday in my life. [ ]
A. a most exciting
B. a more exciting
C. the most excited
D. the more excited
肺癌晚期手术会引起如下症状,但可除外()
A.食管压迫
B.胸壁转移
C.上腔静脉综合征
D.胸膜腔积液
E.颈丛神经压迫