球速的快慢取决于合法还击所耗费的时间。
参考答案：对
要使4□9÷45的商是一位数，□里可以填______．
We listened dumb-struck, full of (), to the shocking details of the corruption of the president of the company.
A. incredulity
B. ingenuity
C. ingenuousness
D. incredibility
