第7题: [单项选择]Optometristis (验光师) will happily testify that the only significance of thick, hornrimmed glasses is that they distinguish persons with bad eyes ( ) intellectual or illiterate. A. they are B. are they C. be they D. they be 参考答案:C 答案解析:
..or...表示“不管……,还是……”,固定搭配。
第8题: [多项选择]PVC的工序的主要意义()。 A. 良好的气密性 B. 良好的装饰性 C. 防水 D. 防石击 参考答案:A, B, C, D