Skimming is one of the major types of selective reading. It differs from normal reading,_________ not all of the material is read.

A． in that

B． in which

C． at that

D． by which

[单选题]The major technical areas of computer security are usually represented by the initials CIA(71)，integrity，and authentication or availability．A．confidentialityB．confidentC．secretD．safety

[单选题]For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.A . cylinder casingB . cylinder boreC . crankcase doorD . aperture in the cylinder block

[单选题]For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.A . the cylinder coverB . the bottom of bed-plateC . the sumpD . the crankcase door

[单选题]One solution to major security problems is(72) ,which are frequently installed to fix known security holes.A．additionsB．compensationsC．patchesD．complements

[单选题]One solution to major security problems is(73)，which are frequently installed to fix known security holes．A．patchesB．compensationsC．complementsD．additions

[单选题]One solution to major security problems is(75), which are frequently installed to fix known security holes.A．patchesB．compensationsC．complementsD．additions

[单选题]One solution to major security problems is(71), which are frequently installed to fix known security holes。A．additionsB．compensationsC．patchesD．complements

[单选题]One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.A . the extra weight required for the diesel reduction gearingB . a minimum speed for the engines that limits the minimum speed of the vesselC . the highe

[单选题]One solution to major security problems is( )， which are frequently install

[单选题]Part Ⅱ Reading Comprehension (Skimming and Scanning)D．irections: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet I. For questions 1-7, choose the best answer from the four choices marked