调节内脏活动和内分泌活动的皮质下中枢是（）
A.上丘脑
B.延髓
C.下丘脑
D.匠脑
E.底丘脑
参考答案：C
. “I hear Johnson was badly injured in the accident.” “_______ let‘s go and see him.”
A．What‘s more
B．If so
C．Where possible
D．When necessary
鼠疫杆菌的主要储存宿主为()
A．褐家鼠
B．旱獭和黄鼠
C．田鼠
D．黑绒姬鼠
E．松鼠
