l、在胸部经第5、第6胸椎椎间盘的水平断面上,见不到
A. 升主动脉
B. 上腔静脉
C. 左肺动脉
D. 气管隆嵴
E. 胸腺
Rewritethefollowingsentencesothattheyarepositiveratherthannegativeintone.1.Unfortunately,yourordercannotbesentuntilnextweek.2.Toavoidthelossofyourcreditrating,pleaseremitpaymentwithin10days.3.YourmisunderstandingofourJanuary8lettercausedyoutomakethismistake.4.YourcannotvisittheplantexceptonSaturday.5.Ourmaterialwon’tdothejobunlessitisreinforced.6.Yournegligenceinthismattercausedthedamagetotheequipment.7.WeregrettoinformyouthatwecannotpermityoutouseourclubhouseforyourmeetingonSaturday,astheBoyCorpaskedforitfirst.Wecan,however,letyouuseourconferenceroom,butitseatsonly60.8.Weregrettoinformyouthatwemustdenyyourrequestforcredit.