锥体外系的功能是
A.发动肌肉收缩B.协调肌群运动C.维持机体平衡D.维持大脑皮质的兴奋状态E.激发大脑皮质发出传出冲动
参考答案:B
下列关于卵巢的正确说法是
A.髓质中含有致密结缔组织
B.髓质中有数以万计的原始细胞
C.髓质中含有平滑肌组织
D.皮质含疏松结缔组织
E.以上均不是
—Can I see the headmaster at the moment, please?
—I'm afraid not. He _________out. He _________ in 10 minutes.[ ]
A. goes; comes
B. gone, came
C. will go; will come
D. has gone; will come back