阅读下面的文字，完成问题。 方山子，光、黄间隐人也。少时慕朱家、郭解为人，闾里

若m=2¹²⁵，n=3⁷⁵，则m、n的大小关系正确的是（　　）

A．m＞n

B．m＜n

C．m=n

D．大小关系无法确定

判断。（对的打“√”，错的打“×”）

1．边长是1千米的正方形土地，面积是1平方千米。[ ]

2．两个图形的面积相等，周长一定也相等。[ ]

3．用8个1平方分米的正方形无论拼成什么图形（不重叠），面积都是8平方分米。[ ]

4．贝贝的手掌面积约1平方厘米。  [ ]

5．一个长方形的长增加3米，宽增加2米，面积就增加6平方米。[ ]

以下急性重症胰腺炎的诊断要点，不正确的是（）。

A.弥漫性腹膜炎，腹胀明显，肠鸣音弱

B.血性或脓性腹水

C.伴有休克

D.白细胞降低

E.血糖>11.1mmol／L，血钙<1.87mmol／L

Passage Two

Five years ago, David Smith wore an expensive suit to work every day. "I was a clothes addict," he jokes. "I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled. " Today David wears casual clothes—khaki pants and sports shirt—to the office. He hardly ever wears a necktie. "I’m working harder than ever," David says, "and I need to feel comfortable. "
More and more companies are allowing their office workers to wear casual clothes to work in the United States. The change from formal to casual office wear has been gradual. In the early 1990s, many companies allowed their employees to wear casual clothes on Friday (but only on Friday). This became known as "dress-down Friday" of "casual Friday". "What started out as an extra one-day-a-week benefit for employees has really become an everyday thing. " said business consultant Maisly Jones.
Why have so many companies started allowing their employees to wear casual clothes One reason is that it’s easier for a company to attract new employees if it has a casual dress code. "A lot of young people don’t want to dress up for work, "says the owner of a software company, "so it’s hard to hire people if you have a conservative dress code. "Another reason is that people seem happier more productive when they are wearing comfortable clothes. In a study conducted by Levi Strauss and & Co. , 85 percent of employers said that they believe that casual dress improves employee morale. Only 4 percent of employers said that casual dress has a negative impact on productivity. Supporters of casual office wear also argue that a casual dress code helps them save money. "Suits are expensive, if you have to wear one every day," one person said. "For the same amount of money, you can buy a lot more casual clothes. \

According to this passage, which of the following statements is true

A．Company workers started to dress down about twenty years ago.

B．Dress-down has become an everyday phenomenon since the early 1990s.

C．"Dress-down Friday" was first given as a favor from employers.

D．Many workers want to wear casual clothes to impress peopl

火力发电厂中发电机是将（）的设备。

A.热能变为电能

B.化学能变成热能

C.机械能变为电能

D.热能变为机械能