题干
—How much is _______ for a schoolbag?
—Experts say students should carry_______ more than 10 or 15 percent of their body weight.
—Experts say students should carry_______ more than 10 or 15 percent of their body weight.
A：far more; no
B：too much; not
C：very much; any
D：many more; much
答案(点此获取答案解析）
B
是自然数时，
的值
