题目内容
(请给出正确答案)
[单选题]
-Oh, Mario! Youshouldhaveleftthebagin thecar.--Don'tworry, Granny! It'snotsoheavyas you__()
A.meant
B.xpected
C.imagined
D.wondered
答案
C、imagined
如果结果不匹配,请 联系老师 获取答案
A.meant
B.xpected
C.imagined
D.wondered
C、imagined
A.NaOH>Ca(OH)2>Ba(OH)2>Be(OH)2
B.NaOH>Be(OH)2>Ba(OH)2>Ca(OH)2
C.NaOH>Ba(OH)2>Be(OH)2>Ca(OH)2
D.NaOH>Ba(OH)2>Ca(OH)2>Be(OH)2
A.-OH>-CH3>-COOH
B.-COOH>-OH>-CHs
C.-OH>-COOH>-CH3
D.-COOH>-CH3>-OH
鉴别下列各组物质:
①Be(OH)2,Mg(OH)2;
②Na2CO3,NaHCO3,NaOH;
③Ca(OH)2,CaO,CaSO4;
④BeCO3,MgCO3,PbCO3。