周围血管征的发生机理是（）
A.舒张压过高
B.收缩压过高
C.脉压过大
D.脉压过小
E.心律失常
参考答案：C
I think the environment is really important. __________ I like __________ my bike.[ ]
A. Beside, riding
B. Besides, riding
C. Except, to ride
The president spoke at the business meeting for nearly an hour without ______ his notes.
A．bringing up
B．referring to
C．looking for
D．trying on
