检查机身下蒙皮是否有裂纹。 A: Examine the bottom skin panels of the fuselage for cracks. B: Inspect fuselage lowermost skin panels for cracks. C: Inspect fuselage underside skin panels for cracks.

How long will it take for the panels to pay for themselves?

The whole instrument panels of cockpit are replaced, including hard-wired dedicated switches.

The main raw material of wood-based panels is wood or no-wood plant fiber material.

A symposium is similar to a forum, except that ______ seems to be more formal in a symposium. Whether by individuals or panels, the method is one of ______ .

Which are the examples of particle reinforced composites?‏ A: Sandwiched panels B: Laminates C: Gravel reinforced concrete D: Carbon black reinforced rubbers

For households looking to adopt solar technology, using photovoltaic panels installed on the roof is generally more cost-effective than installing a solar water heating system.

For households looking to adopt solar technology, using photovoltaic panels installed on the roof is generally more cost-effective than installing a solar water heating system._

Solar panels, wind turbines, hydro power and geothermal energy and hydrocarbons (natural gas or coal) can all be used to produce hydrogen (a primary energy).

Which of the following methods of market research is not an example of "primary research"? ( ) A: Questionnaires B: A company’s own sales statistics and records C: Test marketing D: Consumer panels