题目

. When chatting with a stranger on the Internet, bear in mind______ he could be anybody, for you can’t see him _________. A. that; in particular      B. that; in person    C. what; in detail    D. \ ; in public 答案：B下列能说明光沿直线传播的是（ ）A．平面镜成像B．透过玻璃窗看窗外的景物往往是变形的C．日食、月食的形成D．湖水中的月亮