结肠癌最主要的转移途径为（）
A.直接蔓延
B.腹腔种植转移
C.血运转移
D.淋巴转移
E.远处转移
参考答案：D
--- After discussing, the students came up with some good ideas to work on the project_____.
--- That’s great!
A．at the end
B．in the end
C．by the end
D．to the end
低压验电器的测量范围是（）伏。
A.36至220
B.60至380
C.60至500
