第9题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He is surprised. B. He feels very happy. C. He is indifferent. D. He feels very angry. 参考答案:C 答案解析:[听力原文]
W: Billy, have you heard the latest news It appears that we won’t be laid off after all.
M
第15题: [单项选择]下列关于铅的说法错误的是 A. 铅笔芯的主要成分是铅 B. 香烟中是含铅的 C. 铅在人体内日积月累,不会分解 D. 汽油中添加铅元素可以起到防爆的作用 参考答案:A 答案解析:解析
铅笔芯主要成分是是石墨.铅笔的笔芯是用石墨和粘土按一定比例混合制成的。铅笔上标注的“H”即英文"Hard"(硬)的词头,代表粘土,用以表示铅笔芯的硬度。"H"前面的数字越大(如6H),铅笔