【单选题】The purpose of Emily Rosa's experiment was
A.
to see why TI' could work the way it did
B.
to find out how TI' cured patients' illnesses
C.
to test whether she could sense the human energy field
D.
to test whether a human energy field really existed
【单选题】The purpose of Emily Rosa's experiment was ______.
A.
to see why TI' could work the way it did
B.
to find out how 'IT cured patients' illnesses
C.
to test whether she could sense the human energy field
D.
to test whether a human energy field really existed
【单选题】当删除父表中的数据时,在CREATE TABLE语句的外键定义中指定的()选项删除子表中的数据。
【判断题】We must avoid any mental or physical damage to the subjects in empirical research.
【判断题】乘旅游车观光旅游,导游可以在午饭后安排游客购物,以调动游客的情绪。
【单选题】Do remember to be________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.