部颁CDT规约遥测的控制字有哪些（）
A.F4
B.61
C.B2
D.80
参考答案：B
分组打道钉时，前后距离应不少于（）根木枕。
A、2
B、3
C、5
D、6
You say you don’t believe in marriage,but I bet you sing a different song when you finally ______ with this beautiful girl.
A．fall in love
B．get along
C．are connected
D．are pleased
