31.The study demonstrates that the quality of reaction accelerator can influence the density of refined copper.
32.It’s estimated that the claw hook of the cargo crane can’t heave the heavy lumber up.
33.It’s inevitable that horrible earthquakes will happen in the margin of shifting earth layers.
34.Steel rods that could reinforce concrete structures are indispensable in constructing.
35.A scholar predicted that such festival decoration would be a typical feature (trait) of next magnificent ceremony.
36.The earth’s axis is an imaginative line between the north and south polar and the equator divides the north and south hemisphere.
37.Sulfur dioxide is a toxic gas.
38.It is absolute that the string of a piano vibrates when the keys are struck.
39.Emergence of the Internet is a grand symbol that mankind has access to a network era
40.The philosopher said that human behavior is mostly a product of learning, whereas the behavior of an animal depends mainly on instinct.