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书面表达，假如你是Tom ，以下是你的成绩单。请向你的好朋友Jim写信汇报你的成绩。 Positive commentsEnglish teacherPE teacherMath teacher Good at English; listening is much better than speakingOne of the best boysHard-working Negative commentsHistory teacherScience teacher Could do betterA lazy student 答案：Dear Jim, How is it going? Things are fine here. I got my report card today. Luckily I did OK this time. My English teacher said I was good at English, but my listening is much better than speaking. My math teacher said I was hard-working and my PE teacher said I was one of the best boys in my class. However my history teacher said I could do better. Another disappointed result was in scienc下列哪项明显体现了转基因生物引发的食物安全问题 [     ]A．转基因猪的细胞中含有人的生长激素基因，因而猪的生长速度快，个体大B．转基因大米中含有β-胡萝卜素，营养丰富，产量高C．转基因植物合成的某些新蛋白质，引起个别人过敏D．让转基因奶牛为人类生产凝血因子，并在牛奶中提取