某孕妇怀孕早期曾患病毒感染性疾病，产前检查发现胎儿畸形，该病因属于
A. 遗传性因素
B. 生物性因素
C. 先天性因素
D. 免疫性因素
E. 营养性因素
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用氧的注意事项中，错误的一项是
A. 注意用氧安全，切实做好“四防”
B. 先调节流量后应用
C. 禁止用带油的扳手装卸氧气表
D. 停用时，先关闭氧气开关，再拔出导管
E. 用氧过程中应注意氧疗效果
按照我国的技术要求，距离保护振荡闭锁使用（）方法。
A. 由大阻抗圆至小阻抗圆的动作时差大于设定时间值即进行闭锁
B. 由故障起动对Ⅰ、Ⅱ段短时开放，之后发生故障需经振荡闭锁判别后动作
C. 整组靠负序与零序电流分量起动
喷灯施工时，施工地点严禁放置易燃、易爆物品，并应配备()等消防器材。
A. 铁板
B. 灭火器
C. 砂袋
D. 汽油
在加工过程中，会重新人为加入某些食物的维生素和矿物质，但却未必和原来的一样健康。
A. During processing, some food’s vitamins and minerals may be artificially added back in, but it’s unlikely to be as healthy as the original.
B. During processing, some food’s vitamins and minerals may be artificially added back in, but it’s not alike to be as healthy as the origin.
C. During the process, some food’s vitamins and minerals may be handily added back in, but it’s not likely to be as healthy as the original.
During processing, some artificial food’s vitamins and minerals may be added back in, but it’s not likely to be as healthy as the origin.
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