说明鱼体绝对新鲜的K值范围为()
A.K≥20%
B.K≤20%
C.K≥30%
D.K≤30%
E.K≥40%
参考答案:B
If I________everything about Picasso already,I wouldn’t have to read the book.[ ]
A.know
B.knew
C.had known
D.have known
可燃物在空气中没有外来火源的作用,靠自热或外热而发生燃烧的现象称为( )。
A.闪燃 B.阴燃C.爆燃 D.自燃