铺筑沥青层前,应检查()或下卧沥青层的质量,不符要求的不得铺筑沥青面层。旧沥青路面或下卧层已被污染时,必须清洗或经铣刨处理后,方可铺筑沥青混合料。
参考答案:基层
阅读下面图示,完成短文,每空词数不限。
Here are the steps for 1._______________ hand wash!
First, wet your hand with water. Then put some soap on your hands. And lather (形成皂沫) at least
15 seconds. 2._______________, rinse your hands 3._______________. Dry 4._______________ with
some paper towel or a hand dryer. Finally, please 5._______________ to turn the taps off with towel.
下面关于HDL的说法错误的是()
A.蛋白质含量在脂蛋白中最高
B.密度为1.063~1.210
C.有诱发动脉硬化的作用
D.输送外周组织的胆固醇进入肝脏后排泄
E.有抗动脉硬化的作用