下列哪种情况下,可使心排出量增加()
A.心迷走神经兴奋时
B.颈动脉窦压力升高时
C.动脉血压升高时
D.使用去甲肾上腺素时
E.使用肾上腺素时
参考答案:E
在山区道路跟车行驶要随时寻找机会超车。
用所给词的适当形式填空(本题有5小题,每小题1分,共5分)
小题1:The ruler (use) since I began my school life.
小题2:Tony didn’t find (learn) English easy.
小题3: (compare) with Paris, London is larger.
小题4:My mother encouraged me (enter) the competition of this year.
小题5:His memory of the (please) trip will last long.