细胞膜上实现原发性主动转运动能的蛋白是（） A.载体蛋白 B.通道蛋白 C.泵蛋白

Mr. and Mrs. Smith always spent their holiday in London in the past, staying in a small inn at the foot of a hill. One year, however, Mr. Smith made a lot of money in his business, so they decided to go to New York and stay at a really good hotel while they went touring around that famous city.
They flew to New York and arrived at their hotel late one evening. They expected that they would have to go to bed hungry, because in that small inn in London, no meals were served after seven. They were therefore surprised when the man who received them in the hall asked whether they would take dinner there that night.
"Are you still serving dinner" asked Mr. Smith.
"Yes, certainly, sir," answered the man. "We serve it until haft past nine."
"What are the meals then" asked Mr. Smith.
"Well, sir," answered the man, "We serve breakfast from seven to half past eleven in the morning, lunch from twelve to three in the afternoon, tea from four to five. And dinner from six to half past nine."
"But that hardly leaves any time for us to see the sights of New York," said Mrs. Smith.

Mr. and Mrs. Smith ______ in the past.
[A] had often stayed in a big hotel in London
[B] had traveled to many places
[C] often stayed in a small inn

风险分析的主要方法不包括( )。

A．风险概率估计

B．风险解析法

C．社会经验集合法

D．蒙特卡洛模拟

一般富氧1.0%，可提高理论燃烧温度35°～45°，增加喷煤率40%。

《建设工程工程量清单计价规范》（GB50500-2013）规定，投标人经复核认为招标人公布的招标控制价未按照《工程量清单计价规范》的规定进行编制的，应在招标控制价公布后（）天内向招投标监督机构和工程造价管理机构投诉。

A.5

B.7

C.15

D.20

通常所说的电子数据处理系统(EDPS)、事物处理系统(TPS)、管理信息系统(MIS)、决策支持系统(DSS)、专家系统(ES)和办公自动化系统(OAS)都属于计算机信息系统的范畴，它们都是计算机 ______ 的应用。