使用千分尺测量前应()。
A、打油
B、用塑料衬垫
C、用薄纸衬垫
D、校准尺寸
参考答案:D
The novel was so interesting that he read it _____ in a single day.
A.from word to word
B.from sentence to sentence
C.from chapter to chapter
D.from cover to cover
正常成人补吸气容积参考值是()
A.2160ml(男),1400ml(女)
B.2617ml(男),1970ml(女)
C.4160ml(男),2800ml(女)
D.1130nd(男),700ml(女)
E.700ml(男),500ml(女)