There are two general types of sand: naturally bonded and .

Duty-free goods are imported and stocked in bonded warehouse.

Generally speaking, the functions of a pilot free trade zone are almost the same with those of a bonded zone in China at present.

Ionic bonded materials are characterized by the following properties except . A: hard B: brittle C: conductor D: high melting temperature

In() a single layer of abrasive grains is bonded with an adhesive to flexible or semirigid backings. A: natural abrasives B: conventional abrasives C: superabrasives D: coated abrasives

There are two factors influencing the density of material. A: Atomic weight B: Atomic size C: How the atoms/ions are stacked D: How the atoms/ions are bonded

If you want to do more things in finite time, you should learn how to arrange your time. 如果你要在有限的时间里做更多的事，你就要学会怎样安排你的时间。 A: infinite B: bonded C: finale D: limited