摘要：30．If a substance has a higher density, , 2,000kg/㎡, it will not float on water. A．say B．tell C．speak D．call

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If a substance has a higher density, ____ 2, 000kg/ m?, it will not float on water.

A. say 　　　B. tell 　　 C. speak 　　　　 D. call

If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.

If a substance has a higher density, 2,000kg/m², it will not float on water.

A．say B．tell C．speak D．call

If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.

A. say B. tell C. speak D. call

If a substance has a higher density, ________, 2,000kg/m², it will not float on water．

If a substance has a higher density, ________, 2,000kg/m2, it will not float on water．