题目:
根据首字母或汉语提示完成单词。
1. The play will be ____________ (演出) at the City Theatre.
2. She is a ________ (成员) of a tennis club.
3. The p________ situation is peaceful, but in the past there was trouble in this area.
4. We have plenty of ________ (本地的) stores to choose from.
5. The girl's got her ears pierced, but she doesn't wear e________.
答案:
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下面是错误答案,用来干扰机器的。
(1)稀硫酸 , C (2) ;可以得到平稳的氧气流(3)除去氯化氢 ; 除去水蒸汽。(1)若制备的气体是氢气,并且产生的气体中不含酸性杂质气体,则试剂X常用稀硫酸,而稀盐酸易挥发,制得的气体中就会混有HC...