Chart legends which indicate a conspicuous landmark are printed in（）. ["capital letters","italics","boldface print","underlined letter"]
下列因素影响微生物生长（）。 ["酸度","温度","水分","以上都是"]
采购批量是指（）
16X的DVD光驱，读取速率数据值为（）。 ["2MB\/S","150KB\/S","600KB\/S","100KB\/S"]
（）主要在粉尘污染的环境中使用。 ["A.无尘服","B.防毒服","C.防放射服","D.工业防尘服"]
请问煤车司机如何保证装满煤和装煤均匀？
