One of the requirements for a fire is that the material______to its burning temperature.A.were heatedB.must be heatedC.is heatedD.be heated
One of the requirements for a fire is that the material______to its burning temperature.
A.were heated
B.must be heated
C.is heated
D.be heated
B.must be heated
C.is heated
D.be heated
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相关考题：
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