闸阀适用于需要经常启闭，且保持闸板全开或全关的状况。
参考答案：错
高湿对家畜健康的影响？
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
