太阳中风之“脉缓”是指（）
A.怠慢迟缓
B.脉沉弱
C.松驰
D.柔缓而不紧急
E.脉细弱
参考答案：D
用户口令和操作权限可以由操作员自行修改。 ( )
By the time I got to school, I realized I_________ my backpack at home.[ ]
A. left
B. had left
C. was leaving
D. had forgotten
