国内某证券投资基金股票组合的现值为1.6亿元，为防止股市下跌，决定利用沪深300指数期货实行保值，其股票组合与沪深300指数的β系数为0.9，假定当日现货指数是2800点，而下月到期的期货合约为3100点。那么需要卖出（ ）期货合约才能使1.6亿元的股票组合得到有效保护。
【单选题】
髙分化鳞癌最典型的病理特点是（）。
A.
癌细胞核分裂象多见
B.
形成癌巢
C.
出现角化珠
D.
细胞间可见细胞间桥
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参考答案
参考解析
【单选题】
Which of the following is least important in developing school-based teaching materials?
Students' level and interest.
Teachers' professional expertise.
The aim and need of your school.
The form of the teaching materials.
【单选题】
A市常住人口350万人，2021年，该市发生安全伤亡事故6起：火灾事故2起，分别造成13人死亡和1人死亡；道路交通事故2起，其中1起造成4人重伤，另1起造成1人死亡，2人轻伤；坍塌事故1起，造成1人死亡，3人重伤；容器爆炸事故1起，造成8人重伤。下列事故统计指标中，计算正确的是（ ）。
百万人火灾死亡率4
千人死亡率0.0043
千人重伤率0.0049
重大事故率0.33
↓、TSH正常【单选题】
某分部工程的4个施工过程（Ⅰ、Ⅱ、Ⅲ、Ⅳ）组成，分为6个施工段。流水节拍均为3天，无组织间歇时间和工艺间歇时间，但施工过程Ⅳ需提前1天插入施工，该分部工程的工期为（ ）天。
21
24
26
27
【单选题】
Rob Spohr
says that he switched to electrical engineering because he loves working with tools.
points out that there are enough people to fill the jobs that don’t need much skill.
points out that the US doesn’t manufacture anything anymore.
believes that it is important to keep a close eye on the age of his workers.
says that for factory owners, workers are harder to find because of stiff competition.
points out that a work / life balance can attract young people into manufacturing.
says that the manufacturing recession is to blame for the lay-off of the young people’s parents.
