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【多选题】
实验过程中不慎发生生石灰烧伤事故,处理方法不正确的是A.
立即用大量水冲洗
B.
立即用 1%~2% 的醋酸冲洗
C.
先用卫生纸或干布尽量清除皮肤上的生石灰，再用大量水清洗
D.
立即用 1%~2% 的碳酸钠溶液冲洗
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皮皮学刷刷变学霸
举一反三
【单选题】Recently, a possible alternative way of producing paper has been suggested by agriculturalists and environmentalists: a plant called hemp. Hemp has been cultivated by many cultures for thousands of ye...
A.
Ropes.
B.
Waterproof cloth.
C.
Engine fuel.
D.
Life rafts.
【简答题】Wood has been used to make paper since the 19th __________(世纪).
【单选题】All these days he ______ on his paper.
A.
has worked
B.
has been working
C.
was working
D.
is working
【简答题】.The old paper mill has been ______to make way for a new shopping centre. A)held down B)kept down C)cut down D)turn down
【简答题】Before Straus presented his paper, it has already been proved that ______ may affect the development of children.
【单选题】—Will you lend me some paper? —Sorry, mine ______. [ ]
A.
is running out of
B.
has been run out
C.
has run out
D.
has run out of
【单选题】These days Victoria has been __________ in her graduation paper and has no time to take care of her pet dog. [ ]
A.
employed
B.
used
C.
devoted
D.
hired
【单选题】Paper _____ the fibres of plants for many years.
A.
has been made from
B.
have been made out of
C.
has made up of
D.
have been made into
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