森林被砍伐殆尽后,经历较长时间仍可恢复成森林.关于这一演替过程的叙述中,不正确的是( )
下列光学知识中,说法错误的是( )
____(凝视,盯着看)at people is considered rude in Britain and young children will be scolded by their parents if they look too long at another person.
1513 ﹣( 213 + 57 )=____;
2.7×3.4+3.4×6.3+3.4=____;
12.5×2.5×32=____;
101×98=____;
(2.4+2.4÷0.6)× 12 =____;
89 ÷ 79 × 34 =____;
3﹣( 34 ﹣ 58 )× 423 =____;
815 ÷( 23 + 12 )÷ 74 =____.