Listentothepassageandsupplythemissingwordsorphrases. Answer the following two quetions based on what you have heard.  Asthecarindustrydevelops,trafficaccidentshavebecomeas(1).asthecommoncold,yettheircauseandcontrol(2)aseriousproblemthatisdifficulttosolve.(3)havelongrecognizedthatthisdiscouragingproblemhasnotablecauses. Attheveryleast,itisaproblemthat(4)threefactors:thedriver,the(5)andtheroadway.Ifalldriversexercisedgood(6)atalltimes,therewouldbefeweraccidents.Butthisisratherlikesayingthatifallpeoplewerehonest,therewouldbenocrime.(7)hashelpedtomakehighwaysmuchsafer.Butthetideofaccidentscontinuestorisebecauseof(8) andenormousincreaseinthenumberof(9)ontheroad.Attentionisnowturningincreasinglytothethirdfactoroftheaccident,thecaritself.Sincepeopleassumethataccidentsare(10),theywanttoknowhowcarscanbebuiltbettertoprotectthedrivers.
举一反三
- 下面的逻辑表达式中合法的是( ) A: (7+8)&&(9-5) B: 9>;6&&8<;10 C: (9%4)&&(8*3) D: (9*5)||(9*7)
- 下面的逻辑表达式中合法的是（） A: (1+2)&&(6-4) B: (2*3)||(3*5) C: (6>2) && 7<10 D: (9%4) && (8*3)
- 下面的逻辑表达式中合法的是_____( ) 。 A: (7+8)&&(9-5) B: (9*5)||(9*7) C: 9>6&&8<10 D: (9%4)&&(8*3)
- 当变量c的值不为2、4、6时，值为"真"的表达式是（ ） A: (c>;=2 && c<;=6)&&(c%2!=1) B: (c==2)||(c==4)||(c==6) C: (c>;=2 && c<;=6)&& !(c%2) D: (c>;=2 && c<;=6) || (c!=3) || (c!=5)
- 当变量c的值不为2、4、6时，值也为“真”的表达式是（ ）。 A: (c == 2) || (c == 4) || (c == 6) B: (c >= 2 && c <= 6) || (c != 3) || (c != 5) C: (c >= 2 && c < -6) && !(c % 2) D: (c >= 2 && c <= 6) && (c % 2 != 1)