联系用的手信号中,()的显示方式,昼间为拢起的黄色信号旗高举头上左右摇动,夜间为白色灯光高举头上。
A、过标信号
B、互检信号
C、道岔开通信号
D、连结信号
参考答案:C
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
General linguistics is generally the study of language as a whole.