First-class players of football must have excellent ball control, but it is not just _____ they do with their feet _____ counts.
A:how; that
B:that; what
C:what; that
D:whether; what
下列词语中,有错别字的一项是 ( )
某校数学兴趣小组要测量摩天轮的高度.如图,他们在C处测得摩天轮的最高点A的仰角为45°,再往摩天轮的方向前进50m至D处,测得最高点A的仰角为60°.问摩天轮的高度AB约是( )米(结果精确到1 米,参考数据: 2≈1.41,3≈1.73)