Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Wooddoesnotconductelectricity;________.
Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
Whenworkersareorganizedintradeunions,employersfindithardtolaythem________.
过(0,1)点作曲线L:y=lnx的切线,切点为A,又L与x轴交于B点,区域D由L与直线AB围成,求区域D的面积及D绕x轴旋转一周所得旋转体的体积.
