题目

Not only I but also Jane and Mary             tired of having one examination after another. A.are         B.is              C.am          D.be   答案：Anot only...but also...连接两个主语时，谓语动词的单复数形式采用就近原则。某兴趣小组想测定某种电烙铁合金丝的电阻率，用螺旋测微器测出合金丝的直径如图所示，则示数为_______mm