手动变速器各档位的传动比等于该档位所有从动齿轮齿数的乘积与所有主动齿轮齿数的乘积。
参考答案：对
卵泡刺激素对卵巢的作用包括（）
A.促进卵泡生长发育
B.促进卵泡成熟
C.促使排卵
D.促使黄体形成
E.促使白体形成
Which of the following statements concerning adrenal parenchymal cells is TRUE
A．Those of the zona fasciculate produce androgens
B．Those of the adrenal medulla produce epinephrine and norepinephrine
C．Those of the zona glomerulosa produce glucocorticoids
D．Those of the cortex contain numerous secretory granules
E．Those of the adrenal medulla produce glucocorticoids
