题目内容
（请给出正确答案）
What properties allow plastics compete strongly with optical glasses？
A) Better wear & abrasion resistance
B) Better toughness
C) Low cost
D) Low density
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更多“What properties allow plastics…”相关的问题
What factors are responsible for the difference in the properties of CO2and SiO2？
A
Mel and Harriet (last names withheld) from Coconut Creek, Florida returned home after a trip up to New York and saw something alarming – their locks had been changed, the power had been turned off, and items were missing. It turns out someone had broken into their house. But it wasn’t any common thief, as WPLG Local 10 News reports.
No random burglar had sneaked in - it was a bank via the company SafeGuard Properties. SafeGuard Properties, based in Ohio, is a business that, “inspects and maintains defaulted and foreclosed properties for mortgage servicers, lenders, and other financial institutions.” They arrived at Mel and Harriet’s home to take it back, believing it was in default. As it turned it out, it wasn’t in default(拖欠). As Mel told WPLG, “We haven’t had a mortgage in 15 years.” So how did it happen？ SafeGuard went to the wrong address.
Attorney Scott Sobol described SafeGuard’s actions as “legalized burglary,” and that “It should have been evident to that company that this was not an abandoned property.” Mel and Harriet their house smells musty (发霉的)because of the power being off, but that they’re mostly embarrassed at the thought of their neighbors thinking their home would be foreclosed after never having missed a bill in their lifetimes.
SafeGuard has a lot of scrutiny(详细审查) these days, as The Huffington Post has reported, Illinois Attorney General Lisa Madigan brought a case against the company late last year. It’s part of what The Huffington Post describes as part of a “wave of unflattering media coverage” of the foreclosure industry. SafeGuard, along with other smaller companies are being accused of unlawfully breaking into homes.
51.What can we learn from the first paragraph？
A.Mel and Harriet underwent a terrible theft
B.The thief was not one person
C.Mel suffered a great loss in the event
D.Mel and Harriet had a good time during their journey to New York
There are many kinds of metals ______.
A、each has its special properties
B、one has its special properties
C、each having its special properties
D、having its special properties
A.each having its special properties
B.having its special property
C.one has its special properties
D.each has its special properties
Which are the flow properties in the following parameters？ Answer:______
A．Speed of Sound B．Velocity C．Specific Heat D．Pressure
Among the following properties, temperatures have the greatest effect on ______.
A) ductility
B) impactstrength
C) hardness
D) strength
