第1题: [单项选择]导致早产的可能原因不包括 A. 双角子宫 B. 下生殖道感染 C. 羊水过少 D. 胎膜早破 E. 多胎妊娠 参考答案:C
第2题: [单项选择]在报警系统中,通常故障或长时故障是指() A. 报警的故障不能自行消失 B. 报警的故障能自行消失 C. 模拟量故障报警 D. 开关量故障报警 参考答案:A
第3题: [单项选择]All _________to Hong Kong were delayed because of bad weather. A. fly B. flights C. flyings D. flies 参考答案:B 答案解析:本题考查名词的构词法。fly作动词时,意为“飞”;作名词时,意为“苍蝇”。night为名词,意为“飞行;航班”。flying为动名词,意为“飞行”。本句意为:所有飞往香港的航班都由于天气的原因而延误了
第9题: [单项选择] The fires were thought to have been started A. purposefully. B. accidentally. C. on the Mexican border. D. in southern California. 参考答案:A 答案解析:从新闻中"Authority said they were seeking two men in connection with the fires,which they believed were