科学家在利用无土栽培法培养一些名贵花卉时，培养液中添加了多种

科学家在利用无土栽培法培养一些名贵花卉时，培养液中添加了多种必需元素，下列各项中，植物吸收最少的是 A. Ca²⁺ B. Mg²⁺ C. Zn²⁺ D. H₂P0₄^_

答案

相关题目

据新华社伦敦2011年9月1日电研究人员调查了超过9.5万人的基

据新华社伦敦2011年9月1日电研究人员调查了超过9.5万人的基因数据，结果发现：如果第16号染色体上名为16pl 1.2的一个区域中的基因被过多复制，就会

How about ________a drink? A. have B. to have C. had D. having

16．在下面一段文字横线处补写恰当的语句，使整段文字语意

16．在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过18个字。互联网是一把双刃剑，用得好，它是

一定能在下列溶液中大量共存的离子组是( ) A．含有大量Al3

一定能在下列溶液中大量共存的离子组是( ) A．含有大量Al3＋的溶液：Na＋、NH、SO、Cl－ B．c(H＋)＝1×10－13 mol/L的溶液：Na＋、Ca2＋、SO、CO C．含有大量

It is the teacher _____taught me when I was a child _____ I’m going to visi

It is the teacher _____taught me when I was a child _____ I’m going to visit. A. that, which B. who, that C. who, which D. whom, that

Are some people born clever and others born stupid? Or is intelligence developed

Are some people born clever and others born stupid? Or is intelligence developed by our environment and our experiences? Strangely enough, the answer to both these questions is yes．To some extent ou

等差数列{an}的前n项和Sn=2n2+n，那么它的通项公式是A.an=2n－1

等差数列{an}的前n项和Sn=2n2+n，那么它的通项公式是A.an=2n－1 B.an=2n+1 C.an=4n－1

He was very busy yesterday; otherwise, he _____ to the meeting. A. would come

He was very busy yesterday; otherwise, he _____ to the meeting. A. would come B. came C. would have come D. will come

科学家在利用无土栽培法培养一些名贵花卉时，培养液中添加了多种

答案

相关题目

最新题目