练习太极拳时，应注意保持（）同一方向，防止内扣等错误动作导致膝关节损伤。
参考答案：膝关节与脚尖
首字母填空。
1.Children like going to an a________ park. It's too fun.
2.The old lady is old enough to make her own d________.
3.Xiao Nan is t________ of snakes, spiders and so on.
4.Tom should stop w________ that silly earring.
5.We get e________ about something and then end up speaking in Chinese.
通过合理设置权限并考虑员工技能水平状况，可有效减少差错，降低（）。
A.操作风险
B.道德风险
C.无效差错
