简述否定的条件。
参考答案：
检材笔迹与样本笔迹出现非本质的符合与本质的差异。
Used to TV shows, _____ everything is quick and entertaining, many people do not have the patience to read a book that requires thinking．
A．which
B．what
C．where
D．when
发蒸糕好，起锅要待（）后进行。
A.蒸汽没有泄气
B.蒸汽排出一半
C.蒸汽经凉水冲击
D.蒸汽自然泄气
