以下几组玩具中，侧重于促进儿童智力发展的玩具是（） ["拼图、拼板、镶嵌板、魔方、棋类玩具","积木、积塑、橡皮泥、沙、雪","秋千、木马、平衡木、皮球、跳绳","口琴、铃鼓、铃铛、不倒翁、笛子"]
杨朔国际题材的优秀散文作品是（） ["《樱花雨》","《荔枝蜜》","《雪浪花》","《茶花赋》"]
两台变压器变比相同，阻抗电压相等，容量不等，则（）。 ["容量大的阻抗大","容量小的阻抗大","阻抗一样大"]
浪涌保护器：通过抑制瞬态过电压以及（）来保护设备的装置。它至少含有一个非线性元件。 ["接地线","接地引下线","接地汇集排","旁路浪涌电流"]
You work as a database administrator for Certkiller .com. You want to configure database backups to be run automatically. Which tool or utility would you use to achieve this？ （） ["The DBMS_JOB package","The BACKUP_JOB package","The DBMS_BACKUP_RESTORE package","The calendar tool in the Operating System （OS）","The backup scheduler in Enterprise Manager （EM）","The DBMS_BACKUP_SCHEDULER packager inline mode"]
芽孢的结构一般可分为（）、（）、（）和（）四部分。
