【简答题】聚丙烯(丙纶)扁条机织物制包装面粉用袋(丙纶扁条表观宽度为2毫米)________________
【单选题】In speaking of the traditional methods of food preservation, the writer ______
A.
expresses doubts about direct smoking
B.
describes salting and pickling as ineffective
C.
condemns direct drying
D.
mentions threshing and winnowing
【简答题】遇有降雾、暴风雨(雪)、扬沙等恶劣天气影响瞭望时,应停止()和()。
【单选题】遇有降雾、暴风雨(雪)、扬沙等恶劣天气影响瞭望时,应()线上作业和上道检查,必须作业时,应采取特殊安全措施,保证来车之前按规定的距离及时下道。