第15题: [单项选择]Turn on the television or open a magazine and you ______ advertisements showing happy families. A. will often see B. often see C. are often seeing D. have often seen 参考答案:A 答案解析:时态用法。在“祈使句+and+并列分句”句型中,并列分句常用一般将来时。
第19题: [多项选择]一般实验室的照度标准值为300Ix,规定的LPD值不应大于11W/m2;设计时按标准规定条件确定降低一级照度,即按200Ix设计,设计中实际的LPD值为()时,符合标准要求。 A. 6.0W/m2 B. 6.6W/m2 C. 7.2W/m2 D. 7.8W/m2 参考答案:A, B, C