【名词&注释】
化学性质(chemical properties)、可燃性(flammability)、陈述句(declarative sentence)
[单选题]物质的下列的性质中，属于化学性质的是（ ）
A. 颜色，状态
密度，硬度
氧化性，可燃性
熔点，沸点
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举一反三：
[单选题]50．—could you take care of our dog while we are away?—__________
A. With pleasure
B. It's my pleasure
C. Never mind
D. That's all right
[单选题]Which of the following is true for both bagels and donuts?
A. They both came from Europe.
B. They are both easy to make.
C. They are both sweet.
D. People in New York make them best.
[单选题]---- I haven’t seen Grace for a long time.---- I haven’t seen her, _____.
A. other
B. too
C. either
D. instead
[单选题]68．
A. no one
B. someone
C. everyone
D. anyone
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