栽了一批树,成活了100棵,还有10棵没成活,成活率是90%.______.
100÷(100+10 )×100%≈91%,
答:成活率约是91%.
故答案为:错误.
We are taught that a business letter should be written in a formal style ________ in a personal style. [ ]
A. rather than
B. other than
C. better than
D. more than
用绳索或锚链将货物拦腰拴捆并挂在门架上,这对无托盘货物装车比较稳固:只作为在装卸过程中的一种临时安全措施。对叉运易碎、贵重、重心偏斜货物,使用这种安全绳尤为重要。