投篮后，投篮的球接触篮圈时，攻守双方不能触及球。
参考答案：对
Daniel has poor eyesight (视力). He always _________ a pair of ________. [ ]
A. wear; glass
B. wear; glasses
C. wears; glass
D. wears; glasses
四冲程发动机每个工作循环曲轴转（）
A.180°
B.360°
C.720°
D.960°
ht (视力). He always _________ a pair of ________. [ ]