A.1/2 B.1/3 C.1/4 D.1/5
A.機(jī)身向右轉(zhuǎn) B.機(jī)身向左轉(zhuǎn) C.機(jī)身前進(jìn) D.機(jī)身后退
A.4% B.5% C.6% D.7%