尼古丁对全部自主神经节具有特殊作用，小剂量能兴奋肾上腺髓质，使之释放肾上腺素。()
参考答案：对
According to the report, as many as 50 percent of patients do not take medicine _____ directed, _____
has drawn doctors' attention.[ ]
A. when; it
B. as; what
C. that; and
D. as; which
鸟类复杂的本能活动中枢是（）.
