题干

下列关于说法或操作中不正确的是                             (    )

A:不慎将水银温度计打碎在地上,可在水银上覆盖一层硫磺粉以避免发生汞中毒

B:浓H2SO4时不慎沾在皮肤上,用布擦后,用水冲洗,再用NaHCO3溶液(3-5%)冲洗

C:浓硫酸具有吸水性,因而能使蔗糖炭化

D:浓硫酸在常温下能够使铁、铝等金属钝化

上一题 下一题 0.0难度 选择题 更新时间:2019-08-23 10:59:38

答案(点此获取答案解析)

C

同类题3

阅读理解

    Everybody should have some level of first aid ability, because accidents and medical emergencies can happen anywhere at any time. St John First Aid courses give you the knowledge and confidence to provide effective first aid whenever it's needed.

First Aid Level 1

    Ideal(理想的) for anyone who wants to learn basic first aid or needs to renew their first aid qualification. Courses can be held at St John or your workplace.

Fee: $162(includes GST)

Duration(持续时间): Eight hours

First Aid Level 2

    Includes all course content from First Aid Level One, plus an additional half day. Ideal for special first aiders, health and safety managers and anyone who needs a first aid qualification.

Fee: $235(includes GST)

Duration: 12 hours

Pre-Hospital Emergency Care (PHEC)

    Advanced training for first aiders who already hold unit standards 6400 and 6402. Ideal for people who require advanced first aid skills or a pre-hospital emergency care (PHEC) qualification for their work.

Fee: $635(includes GST)

Duration: Three days

Child First Aid

    Ideal for parents, grandparents and other family caregivers. A recognized qualification for childcare workers.

Fee: $65(includes GST)

Duration: Four hours

Outdoor First Aid

    First aid response for accidents and medical emergencies in the wilderness. For groups of eight or more.

Duration: One to two days depending on experience

Sports First Aid

    First aid response for common sporting injuries and medical emergencies. Includes ACC injury prevention advice.

Duration: Eight hours.