题目

    Recently, educators and parents become concerned about the poor performance of boys in school. The so-called “boy crisis” in education refers    1    both their academic performance and their behavior. In both areas boys’ results are much    2   (bad) than girls’.     USA data shows that boys rank behind girls in almost all areas of schooling. They earn lower    3   (grade) overall in primary school and high school. They are behind girls in reading and writing, and 30 percent of   4    are in bottom quarter of standardized tests,    5  (compare) with13．下列生理过程与生物膜无关的是（　　）A．叶肉细胞中水的光解B．乳腺细胞分泌乳汁C．tRNA携带氨基酸进入核糖体D．突触小体释放递质到突触间隙