分辨阈
参考答案：
指感觉上能够分辨出刺激量的最小变化量
胃癌最主要的转移途径是
A．直接蔓延
B．淋巴转移
C．血行转移
D．腹腔内种植
E．医源性转移
-What do you know about Darwin after he returned from the trip by sea?
-Well, he got married and ________ down to live in London．[ ]
A．solved
B．settled
C．stayed
D．left
