易与胰头肿块混淆的是()
A．门腔淋巴结
B．右肾上腺
C．右侧膈肌脚
D．十二指肠
E．胃幽门管
参考答案：D
Last week, only two people came to look at the house, _______wanted to buy it. [ ]
A. none of them
B. both of them
C. none of whom
D. neither of whom
“4S+1S=5S”是什么意思？
