双源CT行心脏检查时，X线管和探测器需旋转
A、45°B
暂无解析
Itisimportantto________yourskinfromtheharmfulstrongsunlight.
重写句子：NotuntilhecrossedthelineandfeltthetapesnapagainsthischestdidJohnsonknowhehadwontherace.(loosesentence)
Itisdifficultto________theimplicationbetweenthelines.
Nosoonerhadwereachedhome________aviolentstormbrokeout.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
