Surface Tools的参数可分为()和()。
A.Cross Section
B.Surface
C.NURBS
D.Rhino
A.Cross Section
B.Surface
C.NURBS
D.Rhino
Earth's radiation "budget" (11)_____ an "extremely important parameter that is (12)_____ known", says Robert Charlson, an atmospheric scientist at the University of Washington at Seattle. "It needs to be (13)_____ much better than it is".
(14)_____ about the amount of sunlight reaching Earth's surface were first raised in 1974. Researchers from the United States and Israel recorded a 12% drop (15)_____ sunlight over 40 years at a (16)_____ station in the southern Sinai Peninsula. Since then, others have used a variety of techniques to try to track (17)_____ sunlight. Three years ago, for example, a (18)_____ led by Beate Liepert at Columbia University's Lamont-Doherty Earth Observatory gathered data from ground (19)_____ around the world and found that solar radiation reaching the surface fell (20)_____ 4% from 1961 to 1990.
A.presents
B.offers
C.grants
D.provides