mark
sign
symbol
signal
单选题On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.A Indicates the limits of the navigable channelB Indicates a danger areaC Is used to identify the characteristics of the lightD Serves no significant purpose
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单选题A vessel not under command making way at night would show（）.A two all-round red lights in a vertical lineB anchor lights and sidelightsC two all-round white lights in a vertical line，sidelights and a stern lightD two all-round red lights in a vertical line，sidelights，and a stern light
单选题According to the passage, driving can be safe if ______.A you are patientB you obey all the traffic rulesC you don’t cut another car offD you wait in line at a red light
单选题A light used to signal passing intentions must be an（）.A alternating red and yellow lightB alternating white and yellow lightC all-round white or yellow lightD all-round white light only
问答题We can’t walk across the street when the traffic light is red.
单选题A light used to signal passing intentions must be an （）.A all-round yellow light onlyB all-round white light onlyC all-round blue light onlyD alternating red and yellow light
单选题We may have known someone for ten years and still know very little about him because _____.A we don’t accept the idea that we might never fully know another personB we often get information in a casual and inexact wayC we pay more attention to other people’s motivations and emotionsD we often have face-to-face conversation with him
