Carnoy固定液中无水乙醇:氯仿:冰醋酸的比例正确的是()
A.6:3:1
B.3:6:1
C.5:4:1
D.4:4:2
E.4:3:3
参考答案:A
根据括号中的汉语写单词。
1. My _________ (闹钟) is on the desk.
2. Please look at your _________ (数学书).
3. There are some _________ (激光唱片) in the drawer.
4. What's this? It's a _________ (录音带).
5. My _________ (帽子) is on the chair.
职业技能是指人在职业活动范围内需要掌握的技能。