美国20世纪20年代初期时的社会背景是怎样的？

bMicroblog is pltform ________ people cn express their thoughtsnd communicte with ech other by sending posts.which B．where C．wht D．when

A．which

B．where

C．what

D．when

past peoplGreat changes have been taken place in the way people communicate with each other. In the past people write letters to share informations and later they talked with each other in the telephone. Now more and more people use our own mobile phones to communicating. And instead writing on the paper, they e-mail to each other on the computer. As a result, people find that quicker and easier to communicate, and at the same time some people feel that they become poorer in writing. They worry about whether people can be as closely as before

e wiBynd by, _____ go out to contct other people in person, morend more people tend to socilize with others vi electronic devices.other thn B．rther thn C．more thn D．less thn

A．other than

B．rather than

C．more than

D．less than

扫:右肺上叶高密度影;新生物不除外。入院后予以行CT引导下肺穿刺检查,病理示:右肺上叶腺癌。患者无明显咳嗽咳痰,无咯血,无胸闷胸痛不适。 查体: T3 6.6 °C , P 80 次 / 分, R 18 次 / 分, Bp 120/80 mmHg , 身高 17 0 cm ,体重 60 kg 。 患者择期行手术治疗。 请问: （） 肺癌患者术前要进行的呼吸道准备有哪些?