单项选择题 Is ________ a questionnaire study or a laboratory experiment? What kind of design do you choose?A.designB.instrumentsC.studyD.activity

单项选择题 Language is creative that body communication isn’t. （ ）A.in a wayB.in the wayC.in one way

单项选择题 In the experiment, 10 ml 20% glucose was injected intravenously intorabbits, the urine volume increased significantly due to ( )