技术进步可能会引起设备()。 A.实体性贬值 B.经济性贬值 C.功能性贬值 D.无

题型:单项选择题

问题:

技术进步可能会引起设备()。

A.实体性贬值

B.经济性贬值

C.功能性贬值

D.无形贬值

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题型:单项选择题

阅读理解.

     My sister,Mary,usually starts the day with breakfast. She often has a piece of cake and a glass of milk

for breakfast, then she usually goes to work on foot. After work, she often goes to the music store.

Sometimes she goes to the movies. She likes eating vegetables. She also likes to eat junk food,but she

knows it is bad for her health. So she eats it once a week. In the evening,she often watches TV. Her

favorite program is Around China. She usually goes to bed before 11 o'clock. She thinks she is pretty

healthy.

1. Mary usually goes to work                 .

A. on foot

B. by bus

C. by bike

D. by plane

2. Her favorite TV program is _______________ .

A. Animal World

B. Game Show

C. Around China

D. Today Law(法律)

3. She eats junk food __________a week.

A. once

B. twice

C. three times

D. two times

4. She _________goes to the movies.

A. never

B. always

C. often

D. sometimes

5. She ___________at 11 0-clock.

A. goes to bed

B. is asleep

C. doesn't go to bed

D. isn't asleep

题型:单项选择题

用NA表示阿伏加德罗常数的值,下列说法中正确的是(  )。

A.将NA个HCl分子溶于500 mL水中得到2.0 mol·L-1的盐酸

B.在加热条件下,100 mL 18.4 mol·L-1的浓硫酸与足量金属铜反应得到的SO2的分子数为0.92NA

C.密闭容器中,1 mol SO2与0.5 mol O2充分反应,转移的电子数小于2NA

D.用惰性电极电解AgNO3溶液,产生11.2 L O2时,转移2 mol电子

题型:单项选择题
(-5)2
的化简结果为(  )
A.25B.5C.-5D.-25
题型:单项选择题

下列关于茯苓的现代应用,错误的是()

A.水肿

B.婴幼儿腹泻

C.精神分裂症

D.便秘

E.失眠

题型:单项选择题

铁碳相图成份0.77%的碳钢,自奥氏体相区缓慢冷却时,在727℃要进行()反应。

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