工业与民用配电安装工程分项工程划分,关于备用和不间断电源,叙述不正确的是( )。A

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问题:

工业与民用配电安装工程分项工程划分,关于备用和不间断电源,叙述不正确的是( )。

A.成套配电柜、控制柜(屏、台)和动力、照明配电箱(盘)安装
B.不间断电源的其他动能单元安装
C.裸母线、封闭母线、插接式母线安装
D.桥架安装和桥架内电缆敷设

考点:质量员电气质量员建筑电气工程质量管理
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结核球的直径大小是()

A.直径在2~4cm之间,多小于2cm

B.直径在4~5cm之间,多小于4cm

C.直径在3~5cm之间,多小于5cm

D.直径在1~2cm之间,多小于2cm

E.直径在2~4cm之间,多小于3cm

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用显微镜观察的材料必须薄而透明,必要时还需要染色.______.

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阅读理解。

     Father's Day may be over in the United States, but animal dads are still hard at work. From penguins

to catfish (鲶鱼), some animal-fathers play a big part in raising their babies.

     "Seahorses are possibly the best example of fathers caring for their young in the animal world," said

Heather Mason Jones, a biologist at the University of Tampa in Florida. Human mothers carry their babies

in their bodies for nine months. But seahorses are different. A female seahorse lays eggs and then puts

them in a pouch on a male seahorse's belly (腹部), where the eggs stay until they hatch.

     Male seahorses aren't the only animal dads caring for eggs. The male hardhead catfish carries up to 48

marble-size eggs in his mouth for 60 days! He doesn't eat for the entire time. "You'd think it would be hard

for them to give up a meal," said Ed Matheson, a fish expert at the Florida Marine Research Institute.

     Emperor penguins sit on eggs to hatch them during Antarctica's freezing winter. The males have to gather

closely together for warmth and can lose half of their weight in the two months that it takes the baby penguins

to hatch.

     Even mammal (哺乳动物) dads play a role in raising their young. The male South American marmoset (狨

猴) takes care of the baby in place of the mother a few weeks after she gives birth.

     So next Father's Day, remember the millions of dads hard at work in the animal kingdom!

1. What purpose does the first paragraph serve in the passage?

A. To provide background information.

B. To tell readers an interesting fact.

C. To bring in the topic interestingly.

D. To offer basic knowledge for the text.

2. How many kinds of animal dads does this text mention?

A. One.

B. Two.

C. Three.

D. Four.

3. Which of the following statements is TRUE according to this text?

A. The female hardhead catfish carries eggs in her mouth for 60 days.

B. The male marmoset takes care of the baby as soon as the mother gives birth.

C. The eggs stay in a pouch on a male seahorse's belly until they hatch.

D. Emperor penguins sit on eggs to keep warm during the freezing winter.

4. Who is the text mainly written for? 

A. Biologists.

B. Fish experts.

C. Ordinary readers.

D. American fathers.

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中国精神文化对世界有什么影响?

题型:单项选择题

水牛角可用治:

A.热入营血

B.血滞经闭

C.阴虚发热

D.血热吐衄

E.瘰疬痰核

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