混合血栓可见于（） A.静脉内柱状血栓的尾部 B.毛细血管内 C.急性风湿性心内膜炎

下列各句中加黑的成语的使用，恰当的一项是（ ）

A．美国政府准许石油公司在阿拉斯加天然公园里钻井的决定，引起了国际环保组织的怨声载道。

B．近来，到医院铅中毒专科就诊的孩子骤然增多，许多孩子因铅中毒导致行为异常，家长对此忧心忡忡。

C．即使是小错误也不能放过，须知集腋成裘，小错积多了，也会对工作造成大的损害。

D．对于房价在全国略胜一筹的北京来说，经济适用房的低价位无疑对工薪阶层具有巨大的吸引力。

下列说法正确的是

A．正四面体型的分子结构中键角均为109°28′

B．在晶体中只要有阳离子就一定有阴离子

C．发生化学反应时失去电子越多的金属原子，还原能力越强

D．两种微粒的质子数和电子数均相等，则它们不可能是带异性电荷的离子

Tony decided to sell his horse Please Be True. He wrote to his friend Jimmy as follows:‘Dear JimmyI trust all is well with you old chap. Please Be True is for sale. The price is P7,000·00. If you are interested, come to the house with the money and you can take her away with you.’Jimmy received Tony’s letter and replied as follows:‘My good friend Tony, many thanks for the offer. I would dearly love to buy Please Be True. However P7,000·00 is rather too high a price for a horse. I will pay you P5,000·00 for her.’Tony did not reply to Jimmy’s letter. Two days later Jimmy phoned Tony stating that he was now willing to buy Please Be True for P7,000·00. However by then Tony had already sold the horse to Amanda.Jimmy wishes to sue Tony for breach of contract.Required:

(b) State whether your answer would be different if Jimmy had replied inquiring whether Tony ‘could not go any lower than P7,000·00’. (3 marks)

吊篮脚手架（）后都要进行验收。

A.每月

B.每次提升

C.每天

对母牛发情鉴定比较准确的方法是（）.

A.外部观察法

B.腹部触诊法

C. * * 检查法

D.直肠检查法

E.试情法