( )是指个体以一定方式去影响他人对自己的印象，即个体进行自我形象的控制，通过一定

500kV架空送电线路，导线采用4×LGJ-400/35，子导线直径26.8mm，重量1.348kg/m，位于土壤电阻率100Ω．m地区。

某基铁塔需加人工接地来降低其接地电阻，若接地体采用Φ10圆钢，按十字形水平敷设，人工接地体的埋设深度为0.6m，四条射线的长度均为10m，请计算这基杆塔的工频接地电阻应为下列哪项数值？（不考虑钢筋混凝土基础的自然接地效果、形状系数取0.89）（）

A.2.57Ω

B.3.68Ω

C.5.33Ω

D.5.63Ω

A small dog should be belly-up after eating a handful M＆M’s, at least according to conventional wisdom. But watching “Moose”, a friend’s five-pound Chihuahua, race around a living room after his sweet snack makes one wonder: Is chocolate truly poisonous to dogs?

Dogs and humans have similar tastes. But unlike humans, our companions experience dangerous effects from eating chocolate — it can poison them and in some cases is fatal. Chocolate’s danger to dogs depends on its quality.

Chocolate is processed from the bitter seeds of the cocoa tree, which contain a family of compounds known as methylxanthines（一种衍生物）. This class of substances includes caffeine and the related chemical theobromine(可可碱). Chocolate contains a significant amount of theobromine and smaller amounts of caffeine. These chemicals can cause a dog’s heart to race up to twice its normal rate, and some dogs may run around as if “they drank a gallon of espresso,” according to Hackett.

Dogs are capable of handling some chocolate, but it depends on the animal’s weight and the type of chocolate it eats. Unsweetened baking chocolate contains more than six times as much theobromine as milk chocolate, although amounts vary between cocoa beans as well as different brands of chocolate. Less than four ounces of milk chocolate is potentially fatal for Moose and other small dogs.

Around every confection-centered holiday — Valentine’s Day, Easter and Christmas — at least three or four dogs are hospitalized overnight in the animal medical center at Colorado State. But in 16 years, Hackett has seen just one dog die from chocolate poisoning, and he suspects it may have had an underlying disease that made it more exposed to chocolate’s heart-racing effect.

1. The underlined expression “belly-up” probably means______.

A. dead            B. poisonous                 C. running around  D. having a headache

2. All of the following are true EXCEPT______.

A. chocolate’s danger to dogs depends on its quantity and quality

B. people buy lots of chocolate around Valentine’s Day

C. an ounce of unsweetened baking chocolate is safe for Moose

D. there must be some theobromine or caffeine in espresso

3. What can we learn about Hackett?

A. He is an animal doctor.         B. He is a pet shop owner.

C. He is the owner of Moose       D. He is a doctor in a small hospital.

4. It can be inferred from the passage that Hackett believes that__________.

A. chocolate is truly deadly to dogs 

B. it’s OK to give chocolate to a big dog

C. pets are usually ignored around confection-centered holidays

D. a healthy dog probably could survive a chocolate poisoning

5. The passage is mainly about__________.

A. the poisoning of Moose   

B. the compounds of different chocolates

C. a handful M＆M’s chocolate is poisonous

D. the relation between methylxanthines and chocolate poisoning

企业根据应纳税所得额的一定比例计算上交所得税金额，即为企业的所得税费用。 ( )

（）

A B C D

A．A

B．B

C．C

D．D