油漆的原色是:()
A、红、黄、蓝
B、红、黄、绿
C、蓝、绿、紫
D、红、黑
参考答案:A
Three minutes earlier ____ we could have caught the early train to Philadelphia.
A.or
B.but
C.and
D.so
简述糖尿病运动护理要点。