Text Analysis: Main Idea and Devices for Developing It Back I Main idea Part I The world-shaking disappearance (Paras. 1-3) of the planes has aroused considerable public interest in the Bermuda Triangle, but there are no Part II convincing answers to this mystery. Part ll I Devices for developing it Illustration例证法)kmy. Text Analysis: Main Idea and Devices for Developing It Back Part I (Paras. 1-3) Part II Part III The world-shaking disappearance of the planes has aroused considerable public interest in the Bermuda Triangle, but there are no convincing answers to this mystery. Main idea ? Devices for developing it ? Illustration (例证法) For details