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【单选题】
Stella felt too iii to set up a Christmas tree or stable.A.
Y
B.
N
C.
NG
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【简答题】足阳明胃经的郄穴是（ ）。
【单选题】You will hear 8 short conversations. After each conversation, there will be a recorded question. After each question, there will be a pause of 10 seconds. The conversations and questions will be spoke...
A.
To travel.
B.
To teach.
C.
To work.
D.
To study.
【单选题】听力原文：M: Well, you've asked a rather strange person a pretty standard question. I happened to be doing language for my A level at school, and I decided that I didn't think there was a great deal of fut...
A.
A language teacher.
B.
A university lecturer.
C.
A doctor.
D.
A nurse.
【简答题】足阳明胃经的郄穴是（ ）。
【简答题】在 100 ml 0.20 mol/L MnCl 2 溶液中加入等体积的 0.01 mol/L 氨水,问在此氨水中加入多少克固体 NH 4 C1 ,才不致于生成 Mn(OH) 2 沉淀? K sp Mn(OH) 2 = 1.9 × 10 -13 , K b NH 3 = 1.8 × 10 -5 )
【单选题】100mL 0.30mol/LNa 2 SO 4 溶液和50mL 0.20mol/LAl 2 (SO 4 ) 3 溶液混合后，在相同温度下溶液中SO 4 2- 物质的量浓度为 [ ]
A.
0.20mol/L
B.
0.25mol/L
C.
0.40mol/L
D.
0.50mol/L
【简答题】足阳明胃经的郄穴是
【单选题】M: I heard the company is sending you to Germany for the new project. W: Yes, It'a been a long time since I was there, so I guess it's time to practice my German. Question: Why is the woman going to G...
A.
To study German.
B.
To visit friends.
C.
To work there
D.
To travel there
【单选题】在250ml浓度为0.20mol/L的HAc溶液中,需加人多少克固体NaAc才能使其 [H+]浓度降低100倍。(已知Ka= 1.75 x10-5) ( )
A.
3.8
B.
2.8
C.
1.4
D.
13.8
E.
5.7
【简答题】在 100mL 0.20mol∙L -1 MgCl 2 溶液中加入等体积的含有 NH 4 Cl 的 0.20mol∙L -1 NH 3 ∙H 2 O ,未生成 Mg(OH) 2 沉淀,计算原 NH 3 ∙H 2 O 溶液的 pH 值和 NH 4 Cl 的物质的量。( K b θ (NH 3 ∙H 2 O)=1.8×10 -5 , K sp θ (Mg(OH) 2 )=5.6×10 -12 )
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