题型:选择题 A proposal came up at the meeting _____the protection of giant pandas in Sichuan.A.was concerned withB.concerned aboutC.concerningD.to concern 查看答案
题型:单项选择题 A1/A2型题 腹式呼吸训练指强调膈肌呼吸为主的方法,动作错误的是()A.呼吸时腹部收缩,经鼻缓慢深吸气B.吸气时意念将气体吸往腹部C.呼气时缩唇将气缓慢吹出D.收缩腹肌以增加腹内压E.促进横膈上抬,把气体尽量呼出 查看答案