皮皮学，免费搜题
登录
搜题
【单选题】
Which of the following is True about the heart?____A.
The blood is pumped into the right ventricle and to the pulmonary artery to be sent to the lungs where carbon dioxide is removed and oxygen is added.
B.
During the systole, oxygenated is pumped out of the right ventricle into the aorta and from there through the veins to all organs of the body.
C.
There are four chambers which are made up of several layers of smooth muscles.
D.
The heart is roughly the size of the your fist.
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】气阀的作用是什么?主要由哪些零部组成,是如何工作的?常见的气阀结构形式有哪几种?
【单选题】“单身贵族”“ Duang ”“ we are 伐木累”“此女要火”等大量新词、热词层出不穷,这些词语是现实生活的一面镜子,从某种角度上折射了社会的繁荣。这表明 ( )
A.
文化具有丰富的表现形式
B.
新词、热词提升了我国文化实力
C.
新词、热词的出现是时代的进步
D.
人们在社会实践中创造文化
【简答题】气阀的作用是什么 ? 主要由哪些零部件组成,是如何工作的?