在冠脉循环中（ ）
A. 心室收缩时冠脉流量增加
B. 心室舒张时冠脉流量减少
C. 腺苷浓度升高时，使冠脉扩张
D. 血液中CO2分压升高时，使冠脉扩张
E. 动脉舒张压升高时冠脉流量增多
使冠脉血流量增多的因素有（ ）
A. 舒张压升高
B. 舒张期延长
C. 搏出量减少
D. 腺苷含量增多
E. 交感神经兴奋
How can she ______ to _________ every night?
A. afford; go out
B. offer; eat out
C. afford; eat out
D. offer; go out
--- I’d like to save money. Would you show me a way to ________? --- You can buy used textbook to save money.
A. show of; new books
B. cut costs; used textbooks
C. get off; new clothes
D. take over; everything new
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