下列表示水解的离子方程式正确的是 A.CH3COO— + H2OCH3COOH

题型:选择题

问题:

下列表示水解的离子方程式正确的是                          

A.CH3COO + H2OCH3COOH + OH

B.NH4+ + H2ONH4OH + H+

C.S2-+2H2O H2S+2 OH

D.HCO3-+H2O H3O++CO32-

考点:强电解质、弱电解质电解质、非电解质
题型:选择题

水解机夹套漏会对热水系统会造成()。

A、热水罐汽化

B、水解机温度降低

C、热水泵抽空

D、无大的影响

题型:选择题

听神经瘤起源于()

A.神经胶质细胞

B.脑膜组织

C.Schwann细胞

D.Langhan细胞

E.血管组织

题型:选择题
根据对话内容及方框中所给的句子补全对话, 选项中有两项是多余选项。
A. That sounds terrible!
B. Have you ever read it?
C. It is really a good novel.
D. I always forget.
E. I'm not sure yet.
F. No, I didn't.
G. That's very kind of you.
A: Where did you go?
B: I went to the library to borrow the book Gone with the Wind. 1. _____
A: No, I haven't.
B: That's a pity. 2. _____
A: Well, I've been thinking about borrowing a book from the library for a while.
3. _____
B: Well, look! Here it is. If you like, I can lend it to you after I finish reading.
A: 4. _____ Do you know when that will be?
B: 5. _____ I'll lend it to you as soon as I finish it.
A: By the way, how long can you keep it?
B: Two weeks.
A: That sounds good.
题型:选择题

热处理后的工件其强度、硬度和韧性均较高,而且生产周期短,能耗少,应优先选用,此热处理工艺是( )。

A.退火

B.回火

C.正火

D.淬火

题型:选择题

ADPCM编码可以用于声音数据的压缩编码,其中的自适应特性是指利用自适应改变 (7) 的大小,而差分特性是指 (8)

A.量化阶
B.量化误差
C.量化噪声
D.量化输入

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