在叶鞘裹住的幼叶下部呈现螺旋状.A spiral deformation occured in the lower part of the young leaf enclosed in the sheath.包裹最低两个茎节的叶鞘也应坚硬.The leaf sheath enclosing the lowest two internodes should be stiff too.本实验以高秆野生稻的幼嫩叶鞘和茎为材料.Leaf she...
从该液体中最先逸出的气泡是空气和氢的混合物.The first bubbles to escape from the liquid are a mixture of air and hydrogen.更为活跃的是氢的较重同位素, 氘和氚.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.惰质体是低氧低氢的类木炭物质.Inertinities...