下列各组物质中，属于同系物的是 A．苯和丙苯 B．乙苯和间二甲苯 C．丁二烯和丁烯 D．萘和苯
. Interest, as well as prospects, ______ important when one looks for a job. A. are B. were C. is D. Was
She likes doing things accordingly, and doesn't like her work ________ being interrupted. A．drill B．load C．regulation
有关生命活动调节的表述，不可能发生的是 A．顶芽——分泌生长素——抑制侧芽生长 B．突触前神经元——分泌递质——突触后神经元抑制 C．甲状腺
下图是反映罗斯福新政的一幅漫画，画中罗斯福总统被视为新政医生，他试图拯救生病的“山姆大叔”，旁边站着一名护士。根据美国的政治体制和罗
— Do you think we’ll get somewhere in he future. — I believe it’s quite_____ that we’ll make a difference so long as we work harder. A. certainly B. possibly C. probably D
图2-14是“某城市地租分布等值线示意图”，读图完成5～7题。 图2-14 5.图中等值线的数据（单位：元/m2）有5、25、50、100，其中数据为50元/m2的等值线是
