题目内容

同温度下,石英晶体的膨胀系数比石英玻璃的膨胀系数大

A. 对
B. 错

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对于一般的陶瓷制品,当釉层的膨胀系数大于坯体的膨胀系数时,会使釉层剥弱,造成缺陷

A. 对
B. 错

对于一般的陶瓷制品,当釉层的膨胀系数大于坯体的膨胀系数时,可能会导致釉层龟裂。

A. 对
B. 错

下列说法不正确的是( )。

A. 晶格振动的非线性程度越大,热膨胀系数越大。
B. 当晶体结构类型相同时,化学键弱的材料膨胀系数较小。
C. 结构紧密的多晶二元化合物都具有比玻璃大的膨胀系数。
D. 同温度下,石英晶体的膨胀系数比石英玻璃的膨胀系数大。

Which of the following is true about pronunciation teaching?

A. Learners whose native language has similarsounds are less likely to have problems with pronunciation.
B. Learners who have more exposure to English need less focus on pronunciation.
C. Beginning Chinese learners of English need a certain degree of focus on pronunciation.
D. All of the above

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