一幢6层的楼房,每层高约2.83米.这幢楼房大约高多少米?
2.83×6=16.98(米);
答:这幢楼房大约高16.98米.
I have to look after my____ grandma. She’s been____ for a week. [ ]
A. sick, ill
B. ill, sick
C. ill, ill
D. sick, sick
下列关于脊髓γ运动神经元的描述,正确的是()
A.支配骨骼肌梭外肌纤维
B.兴奋性较α运动神经元低
C.可调节肌梭对牵张刺激的敏感性
D.轴突末梢释放甘氨酸递质