德国寄信到中国多久

如何打好高三化学基础? Is it beautiful?could you tell me?Why did you say that?I want to know.将它们合成宾语从句 化学成为一门独立学科的标志是什么 化学成为真正的学科始于化学真正成为的一门学科并得以较快发展,始于（ ）A.舍勒发现氧气B.质量守恒定律的发现C.原子—分子论的诞生D.中国湿法冶金技术的推广 什么学说的建立使化学成为独立学科 CaSO4是沉淀吗 我做的糯米酒为什么不甜 I won't tell you my secret unless you____ not to tell anyoneA promising B promised C are promising D are going to promise答案a 原因 This is just between you and me.You_________tell anyone about this.A.mustn't B.can C.should D.This is just between you and me.You_________tell anyone about this.A.mustn't B.can C.should D.have not to 填上合适的单词This is a p___ secret.Don't tell anyone elseDon't always c__ yourchildren with others.If I go to the old people's home,I wil bring them some f___.是什么意思? Don't tell the secret to _____(任何人） else 用anyone 还是someone CaSO4 溶于硝酸吗? CaSO4.2H2O溶于硝酸,为什么?为什么呢? CaSO4溶于稀硝酸吗?谁有扎实的基础和肯定的答案就回答, 硫化氢气体使酸性高锰酸钾溶液褪色的化学方程式 I can't tell you now-I'll have to ()it.A.think of B.think about C.think over.D.think out It's so dark.I can't tell you____it's a boy____a girl.A:if,and B:that,and C:whether,or D :if,orhelp me! can you tell me__?i think it's BEN'sA.where he livesB.where does he livesC.whose the dictionary is?说明理由。C选项好像应该是whose the dictionary it is you/I/before/tell/open/to/can't/it 连词成句, 氧气吸多了, 氧气吸多了有什么害处 氧气吸多了对人有没有坏处.谢谢 为什么我做的醪糟有时酸有时甜?而且没有水水?别人卖的里面好多水,怎么搞得, 如何表征是物理吸附还是化学吸附 1.2题, 糯米甜酒48小时都没有酒味,非常甜,是否能吃? 硫化氢通入酸性高锰酸钾溶液（高锰酸钾溶液中加有稀硫酸）的化学方程式是什么? 1L丙烷与xLO2混合点燃,丙烷充分反应后,生成混合气体aL,aL通过碱石灰还剩bL,a-b=6,x为多少? 解答题1、2 1. 2题 偏铝酸根和二氧化碳的反应