题目内容
（请给出正确答案）
The average wavelength of visible light is2,000 times ______ the diameter of an atom.
A．much as
B．as great
C．greater than
D．more than that
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更多“The average wavelength of visi…”相关的问题
This road sign means that you are going into a ________ lane.
In data processing, using an office metaphor, a file is a related collection of(1)records.For example, you might put the records you have on each of your customers in a(2)file. In turn, each record would(3)consist of fields for individual data items, such as customer name, customer, customer number, customer address, and so forth. By providing the same(4)information in the same fields in each record (so that all records are consistent), your file will be easily(5)accessible for analysis and manipulation by a computer(6)program. This use of the term has become somewhat less important with the advent of the(7)database and its emphasis on the table as a way of collecting record and field data. In mainframe systems, the term data set is generally(8)synonymous with file but implies a specific form of organization recognized by a particular access method. Depending on the(9)operatng system, files (and data sets) are contained within a catalog,(10)directory, or folder.
供选择的答案：
1．information 2．directory 3．database 4．consist 5．program
6．synonymous 7．operating 8．records 9．accessible 10．file
A、7.2 eV
B、3.0 eV
C、12.4 eV
D、47.5 eV
A、3.7×10-24
B、4.8×10-24 nm
C、4.8×10-34 m
D、3.7×10-24 fm
A、1.555 GeV
B、938 MeV
C、617 MeV
D、347 MeV
A、Millikan experiment
B、Geiger-Marsden experiment
C、J. J. Thomson Experiment
D、Davisson-Germer experiment
A、L
B、L/2
C、0
D、L2/4
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