皮皮学，免费搜题
登录
搜题
【单选题】
下列关于肌肉活动时加速静脉血回心的正确叙述是()A.
静脉管壁平滑肌节律性收缩，起着 “静脉泵”作用
B.
骨骼肌收缩与舒张，起着 “肌肉泵”的作用
C.
因重力运动时静脉血回心加速
D.
运动时组织液生成减少，因而血容量增加，回心血量也增加
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】小功率直流稳压电源一般由( )、( )、 ( )、( )。
【简答题】D: So what’s your trouble? P: Well, doctor, I haven’t been feeling well lately. My biggest problem is that I’m having ______1________. D: Have you tried any of the sleeping medications available? P...
【简答题】Getting yourselfinsured is the most sensible decision. The four important aspects that a personshould ensure include their belongings, their life, their health and theirfinances. Many people are unawa...
【简答题】Last summer, I began the biggest adventure of my life. I moved from a tiny city in England to one of the largest____________ (city)intheworld,Beijing. Beijing is very different from my home city, Pres...
【简答题】The list below is words Anna talks to herself. Read them and answer the question. P26 “ It will be wonderful to have so many people in the hall. ” “ I ’ ve dreamed of this for years. The music, the br...
【单选题】—— Life of P i is so interesting a film that lots of teenagers like to watch_____. ——I agree with you.
A.
this
B.
that
C.
one
D.
it
【简答题】Question 3. What might the most coo-headed and good-tempered drivers do when they suffer from bad behaviors? Question 4. What is very necessary in modern traffic conditions? Question 5. Can you cite a...
【单选题】The characters presented by the naturalist writers were _____.
A.
more often than not dominated by their environment and heredity
B.
usually idealized heroes or heroines of unspotted virtue and dazzling accomplishments
C.
in most cases examples of human experience
D.
people who were simply all good or all bad
【简答题】根据短文内容和首字母提示填空。 The Internet has become part of people's life. A report (1)s that 38% of the students often use the Internet. Most of them get useful (2)i and use the Internet to help their studies. B...
相关题目：