交通事故的发生都与惯性有关,为了减小事故的发生或减小事故造成的伤害,根据学过的物

题型:问答题

问题:

交通事故的发生都与惯性有关,为了减小事故的发生或减小事故造成的伤害,根据学过的物理知识,请你提出两条防范措施;

(1)______.

(2)______.

考点:惯性现象
题型:问答题

下列肺功能检查结果哪几项提示手术危险性增大()

A.高碳酸血症

B.残气量/肺容量>50%

C.通气储备<70%

D.通气/血流比

E.第1秒时间肺活量<80%

题型:问答题

输尿管下狭窄是()

A.肾盂与输尿管移行处

B.肾盂下5cm处

C.与髂血管交叉处

D.骨盆出口

E.输尿管壁内部

题型:问答题

It was the summer of 1965. Deluca, then 17, visited Peter Buck, a family friend. Buck asked Deluca about his plan for the future. “I’m going to college, but I need a way to pay for it,” Deluca recalls saying. “Buck said, ‘you should open a sandwich shop.’ ”

That afternoon, they agreed to be partners. And they set a goal: to open 32 stores in ten years. After doing some research, Buck wrote a check for $ 1,000. Deluca rented a storefront (店面) in Connecticut, and when they couldn’t cover their start-up costs, Buck kicked in another $1,000.

But business didn’t go smoothly as they expected. Deluca says, “After six months, we were doing poorly, but we didn’t know how badly, because we didn’t have any financial controls.” All he and Buck knew was that their sales were lower than their costs.

Deluca was managing the store and to the University of Bridgeport at the same time. Buck was working at his day job as a nuclear physicist in New York. They’d meet Monday evenings and brainstorm ideas for keeping the business running. “We convinced ourselves to open a second store. We figured we could tell the public, ‘ We are so successful, we are opening a second store.’” And they did — in the spring of 1966. Still, it was a lot of learning by trial and error.

But the partners’ learn-as-you-go approach turned out to be their greatest strength. Every Friday, Deluca would drive around and hand-deliver the checks to pay their supplies. “It probably took me two and a half hours and it wasn’t necessary but as a result, the suppliers got to know me very well, and the personal relationships established really helped out,” Deluca says.

And having a goal was also important. “There are so many problems that can get you down. You just have to keep working toward your goal,” Deluca adds.

Deluca ended up founding Subways Sandwich, the multimillion-dollar restaurant chain.

小题1:Deluca opened the first sandwich shop in order to ________.

A.support his family

B.pay for his college education

C.help his partner expand business

D.do some research小题2:Which of the following is true of Buck?

A.He put money into the sandwich business.

B.He was a professor of business as ministration.

C.He was studying at the University of Bridgeport.

D.He rented a storefront for Deluca.小题3:What can we learn about their first shop?

A.It stood at an unfavorable place.

B.It lowered the prices to poor management.

C.It made no profits due to poor management.

D.It lacked control over the quality of sandwich.小题4:They decided to open a second store because they _________.

A.had enough money to do it

B.had succeeded in their business

C.wished to meet the increasing demand of customers

D.wanted to make believe that they were successful小题5: What contributes most do their success according to the author?

A.Learning by trial and error.

B.Making friends with supplies.

C.Finding a good partner.

D.Opening chain stores.

题型:问答题

扩张型心肌病M型超声心动图检查时,二尖瓣前、后叶开放幅度小且时间短而呈()

A.拱桥状改变

B.鱼口样改变

C.城墙样改变

D.圆顶形改变

E.钻石样改变

题型:问答题

方程式中的称为()。

A.热导率

B.表面传热系数

C.辐射表面传热系数

D.传热系数

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