房地产开发企业销售商品房时不得一房二卖,属于民事义务中的积极义务。()
参考答案:错
下列抗凝剂抗凝原理与Ca2+无关的有()
A.乙二胺四乙酸(EDTA.盐
B.草酸盐
C.肝素
D.枸橼酸盐
E.以上都不是
Passage Three
What is true according to the passage
A.If you listen to your partner very carefully you will feel stressful.
B.When you listen to others, it will put stress on you.
C.Being a good listener will make you get on well with others better.
D.You should be confident if you want to be a good listener.