罪犯文化教育的教员由（），作业由教员统一批改。 ["监狱统一调配","监区长指定","监狱分管领导指派","警察自报"]
下列几类作物中，哪类蛋白质含量最高（）。 ["禾谷类作物","油料作物","豆类作物","薯类作物"]
羊绒的定义？
双梁通用门式起重机和装卸桥主梁上拱度最大值应处在主梁跨中部（）范围内。 ["A、S/10","B、S/15","C、S/20","D、S/25","E、S/5","F、S/3","G、S/4","H、S/6","I、S/2","J、S/7"]
低产桑园的改造措施有（） ["A．压条补株","B．壮苗补缺","C．提高剪定","D．套种更新"]
夹渣有何危害？
