My brother Li Lei often _____ a bus to school. [ ]
A. take
B. takes
C. by
D. carries
答案:B
15只猫头鹰1天能捕捉老鼠180只.照这样计算,1只猫头鹰1星期能捕捉老鼠多少只?
软硬结合插补器由软件完成精插补,由硬件完成粗插补。