p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; text-align: justify; line-height: 28.0px; font: 18.7px 'Songti SC'; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff}span.s1 {font-kerning: none} 以下元素形成化合物时,以共价键结合的是
A.
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; text-align: justify; line-height: 28.0px; font: 18.7px 'Times New Roman'; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff}span.s1 {font-kerning: none} Be
B.
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; text-align: justify; line-height: 28.0px; font: 18.7px 'Times New Roman'; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff}span.s1 {font-kerning: none} Mg
C.
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; text-align: justify; line-height: 28.0px; font: 18.7px 'Times New Roman'; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff}span.s1 {font-kerning: none} Na
D.
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; text-align: justify; line-height: 28.0px; font: 18.7px 'Times New Roman'; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff}span.s1 {font-kerning: none} K