计算题:用20%的漂白粉澄清液,配制5%澄清液时,需加水几倍?
参考答案:
解:20%÷5%=4(倍)
答:需加水4倍。
单词拼写。
根据下列句子及所给汉语注释,在句子右边的横线上写出空缺处各单词的正确形式。
(每空只写一词)
1. I'm very hungry — I _____(错过) luch.
2. Jack took a deep _____(呼吸)and then dived into the water
3. I've got an _____(普通)sort of car, nothing special.
4. I want to thank everyone who has _____(鼓励)and supported me.
5. Jenny spends hours in front of the _____(镜子)!
6. It is _____ (稍微) colder today than it was yesterday.
7. The story is written by an _____(澳大利亚)engineer.
8. Tom was _____(羞愧)of having lied to his parents.
9. _____(一月)is the first month of the year.
10. Can you _____(想象)standing up there and giving a speech?
生鲜牛乳中来源于病畜的致病菌主要是()
A、气肿疽梭菌
B、牛嗜血杆菌
C、金黄色葡萄球菌
D、枯草杆菌
E、腐败梭菌