高二上

加热后在空气中冷却称量 两次称量差超过 加热 偏小 偏小 偏小 偏大 偏小 偏大 偏小 偏小 偏小 偏小 X= 160 (m1m2) 18 (m2m0) 偏大 偏大 偏大 偏大 偏大 〔 练习与评价一 〕 (21) 下列关于硫酸铜晶体中结晶水含量测定的操作中正确的 是。 A、加热后在空气中冷却再称量 B、第一次加热、称量，还要再做一次加热、称量即可 C、坩埚未经干燥即进行称量 D

feel。 sound。 prove等 Cotton feels soft. (adj.) ,如 shut。 open。 move。 read。 write。 sell。 wash。 clean。 catch。 draw。 cut。 photograph等 The book sells well. (adv.) ”发生 (happen/take place), 爆发 (break out)

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How did he finally prove it? 3). Do you think John Snow would have solved this problem without the map? Give a reason. Look at the excited boy! Why is he so happy? He has got the first prize in the

20. The class needs a s__________________teacher. 21. Kindness is one of the prime minister‘s __________________(特 征 ). 22. Britain_________________(议定 ) a trade agreement with China. 23. Don39。 t

with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. separating those who suffered cholera from those who didn’t D. both A and B a conclusion:(得出结论

fantastic • at the party that night. • A. recorded B. recording • C. to be recorded D. having recorded 5. cure • v. / n. 治愈 , 治疗 • This kind of medicine can’t cure him of his headache. • He went to

avoid being rude and talking too much himself. 1. Where did the conversation happen?Who were talking? Zhou Yang talked with his boss, Hu Xin at the office of China Daily 1 Zhou can go out on a story

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as well as at No. 8 and 9 Cambridge Street? John Snow Another Cholera outbreak hit London. These families had not drunk the water from the Broad Street pump. two Steps: What/How? a problem up a