Science is still ______ of the causes of many kinds of cancer.

A．ignorant

B．unconscious

C．conscious

D．informed

[名词解释] Still病

[单选题]Which of the following usually causes a tree to grow unhealthy?A． Giving a tree a special shape and a definite height.B． Removing small side branches and making a tree look less thick.C． Allowing too many branches to grow in the middle.D． Having a tr

[单选题]The pressure ________ causes Americans选择Thepressure________causesAmericanstobeenergetic,butitalsoputsthemunderaconstantemotionalstrain.A．)tocompeteB)competingC)tobecompetedD)havingcompeted

[单选题]The population of the world ____ still ____ now.A．has; grown B.is; growing C.will; grow D.is; grown

[单选题]成人still病A.血清铁蛋白高，高热，皮疹，白细胞增高B.RF阳性，抗SSB抗体阳性，尿pH值9.0C.HLA-B27阳性D.补体C3，C4减少E.

[试题]Scienceandtechnologyhave___inimportantwaystotheimprovementofagriculturalproduction.A)attachedB)assistedC)contributedD)witnessed

[主观题]Scienceandtechnologyhave___inimportantwaystotheimprovementofagriculturalproduction.A)attachedB)assistedC)contributedD)witnessed

[试题]Physicsis_________tothesciencewhichwascallednaturalphilosophyinhistory.A．)alikeB)equivalentC．)likelyD)uniform

[单选题]Withthedevelopmentinscienceandtechnologymancanmakevariousflowers____________beforetheirtime.A)bebloomedB)bloomC)bloomedD)blooming

[单选题]What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）A . Spark plugB . Heat of compressionC . CarburetorD . Glow ping