舱内失火,烟雾较浓,人员撤离时,可用湿毛巾捂住口鼻,可过滤烟气,下列正确的是:
A、把毛巾折得越多越好
B、不用折毛巾
C、毛巾折四折
D、以上都不对
参考答案:C
____ foreign guests come to our school for a visit every year and we exchange ____ information about
education. [ ]
A. A large number of; plenty of
B. A great deal of; a lot of
C. A plenty of; a great deal of
D. A great many of; lots of
下列有机肥属于冷性肥料的是()
A.牛粪
B.马粪
C.猪粪
D.羊粪