1.在表示建议,要求,命令,想法的动词后的从句里,用should + 动词原形,should 可以省略.如 advise,agree,command,decide,demand,determine,grant,indicate,insist,order,prefer,propose,request,require,stipulate,suggest,urge,vote.常考到的是:suggest,advise,demand,require,propose,insist,order,request.<br>His doctor suggested that he (should) take short leave of absence.<br>The author proposed that TV (should) be turned off at least one hour every day.<br>2.在表示建议,要求,命令,想法的名词后的从句里,用should + 动词原形,should可以省略.如 advice,decision,agreement,command,decree,demand,determination,indication,insistence,order,preference,proposal,request,requirement,stipulation etc.<br>It was Bill’s suggestion that everyone (should) have a map.<br>His suggestion was that everyone (should) have a map.<br>He gave us a suggestion that everyone (should) have a map.<br>3.在It is/was +形容词后的that 从句中用should的结构,should 可以省略.这类形容词常见的有:advisable,anxious,compulsory,crucial,desirable,eager,essential,fitting,imperative(绝对必要),impossible,improper,important,natural,necessary,obligatory,
病情分析: 一般来说,只要不超过100ml气体那就不会对身体产生伤害,所以不用担心的, 指导意见: 。十厘米长的空气一般为50ml左右,那些进入到血管内的气体完全可以被组织所吸收,再由肺排出到体外,放心就是了,不会有事的。