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【多选题】
反映过渡金属元素性质的实验现象正确的是 ( ) 。A.
鉴定 Cu 2+ 的试剂是 K 4 [Fe(CN) 6 ] ，现象是生成红棕色沉淀
B.
鉴定 Zn 2+ 的试剂是二苯硫腙， CCl 4 层由绿色变为棕色
C.
用奈斯勒试剂鉴定 NH 4 + ，现象是生成红棕色沉淀。
D.
Hg 2 (NO 3 ) 2 溶液中逐滴加入 KI 溶液至过量，现象是先生成黄绿色沉淀，然后沉淀溶解为澄清溶液，同时生成黑色沉淀。
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反馈参考答案：
举一反三
【单选题】Speaker A: Your son is very hard-working. Speaker B: ________
A.
No, don’t say so.
B.
That’s right.
C.
Thank you.
【单选题】— What do you think of your brother's son? — He _____ be very naughty but at the same time you _____ help liking him. [ ]
A.
will; will
B.
won't; can't
C.
may; may
D.
can; can't
【单选题】— What do you think of your brother's son? — He ____ be very naughty but at the same time you ___ help liking him. [ ]
A.
will; will
B.
may; may
C.
can; can't
D.
won't; can't
【简答题】一般由卧室(与主卫生间)和起居室(与次卫生间)组成,按酒店规定标准配置设备与用品。
【简答题】将军身被坚执锐。（《史记？陈涉》）
【单选题】Your son is becoming very rude. You ______ scold him.
A.
can
B.
ought
C.
may
D.
ought to
【单选题】— How is your son getting along with his work in England? —Well. He’s ___ very easily to the new environments.
A.
adopted
B.
adapted
C.
adjusted
D.
accustomed
【单选题】患者头晕、心悸、齿龈出血、月经量过多半年余。曾在当地服止血药治疗未愈。近 1周因呼吸道感染伴发热、齿龈出血加重来门诊检查。诊断为再生障碍性贫血。 治疗 1年后,最后恢复的是
A.
红细胞数
B.
白细胞数
C.
网织红细胞数
D.
血小板数
E.
血清铁蛋白
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