题目

【1】The text is mainly about how to_____________.A. be a careful driver B. buy MTR ticketsC. be a good passenger（乘客） D. keep safe at home【2】People who will get on the train should _____________.A. wait in line B. open the door C. ask for help D. leave the seats【3】When you hear a “beep” sound, _______________.A. close the door B. rush onto the trainC. get off the train at once D. stop and wait for the next train【4】Which student did the right thing on the train according to the text?A. Daniel ate popcorn on the train.B. Lucy gave her seat to a mother with a little baby下列关于金属腐蚀的叙述正确的是 [　　] A．金属在潮湿空气中腐蚀的实质是 B．金属化学腐蚀的实质是，电子直接转移给氧化剂 C．金属的电化学腐蚀必须在酸性条件下进行 D．在潮湿的中性环境中，金属的电化学腐蚀主要是吸氧腐蚀