2-1.Theauthorthinksthattheconclusionsofanyresearchaboutpeople’sstateofmindare____.

2-2.Whatdoestheauthormeanwhenhesays,“wecan’tturntheclockback”?

2-3.Accordingtoananalysis,comparedwithnormalchildrentoday,childrentreatedasmentallyill50yearsago________.

2-4.Thefirstandmostimportantthingparentsshoulddotohelptheirchildrenis_____.

2-5.Whatconclusioncanbedrawnfromthepassage?

2.Whichwayoftransportationismorecomfortable?

2、人力资源的基本特征有哪些（）？

单人心肺复苏时按压/通气比为30：2，而双人时按压/通气比则为15：2。

错

C语句x*=y+2；还可以写成（）

时段式MRP的主要输入有（）。