进攻作战中,使用烟幕的主要目的是()。A、妨碍敌观察、侦测 B、削弱敌人火力效能 C

题型:多项选择题

问题:

进攻作战中,使用烟幕的主要目的是()。

A、妨碍敌观察、侦测

B、削弱敌人火力效能

C、掩蔽我行动

D、迷惑、欺骗敌人

考点:军事学高技术战争及高技术局部战争高技术战争及高技术局部战争题库
题型:多项选择题

阅读理解。

     Whenever the sun dropped and the blue sky came up, my father and I used to climb the mountain

near my house. Walking together, my father and I used to have a lot of conversations through which

I learned lessons from his experiences. He always told me, "You should have goals like climbing the

mountain," Without the mountain-climbing that we both enjoyed, we couldn't have enough time to

spend together because my father was very busy, I really got a lot from mountain-climbing. It gave

me time to talk with my father and to be in deep thought as well as develop my patience (耐力).

     Once we climbed a very high mountain. It was so challenging for me because I was only ten years

old. During the first few hours of climbing, I enjoyed the flowers and trees, and the birds' singing, but

as time passed, I got a pain in both of my legs. I wanted to quit climbing. In fact, I hated it at that

moment, but my father said to me, "You can always see a beautiful sky at the top of the mountain, but

you can't see it before you reach the top. Only there at the top, can you see all of the nice things, just

like in life."

     At that time, I was too young to understand his words. But later after that, I got new hope and

confidence (信心). I found myself standing at the top of the sky, which was as clear as crystal

(水晶).

1. The passage tells us that mountain-climbing was _____ for the father and son. [ ]

A. hard

B. enjoyable

C. painful

D. comfortable

2. The word "quit" in the passage means "_____". [ ]

A. carry on

B. put off

C. give up

D. pick up

3. Which of the following is similar in meaning to the father's words in the second paragraph? [ ]

A. You will get all you need at the top of the mountain.

B. The sky is always as clear as crystal.

C. You can find life is full of nice things.

D. Never give up half-way.

4. We can infer (推断) from the last paragraph that _____.[ ]

A. the writer was very successful in his life

B. the writer didn't reach the top of the mountain

C. though the writer was young, he could understand his father

D. the writer used to stop half-way when he climbed the mountain

5. The best title for the passage is "_____".[ ]

A. Reaching the Top of the Mountain

B. Enjoy the Beautiful Views

C. Conversations Between Father and Son

D. Father and I

题型:多项选择题

胃大部切除术后出现贫血主要是由于减少了()。

A.主细胞

B.壁细胞

C.黏液细胞

D.G细胞

E.嗜银细胞

题型:多项选择题

学校课外活动小组的同学为检测某传感器而设计的电路如图所示,传感器上标有“3V 0.9W(传感器可看做一个电阻)。滑动变阻器R0上标有“10Ω 1A”,的字样,电流表量程为0.6A,电压表量程为3V,则:                                                          

(1)该传感器的电阻和额定电流各是多少?

(2)荐电路各元件均完好。检测时,为了确保电路各部分的安全,在 a、b之间所加的电源电压最大值是多少?

(3)根据技术资料可知,如果传感器的电阻变化超过1Ω,则该传感器就失去了作用,实际检测时,将一个电压恒定的电源加在国中 a、b之间(该电源电压小于上述所求电压的最大值),闭合开关S,通过调节R0来改变电路的电流和R0两端的电压. 检测记录如下:

通过计算分析,你认为这个传感器是否仍可使用?此时 a、b间所加的电压是多少?

题型:多项选择题

小明居住的社区即将启用“图书馆ATM”(图书自助服务站)项目。为办好这个图书馆,该社区居委会工作人员向小区居民征集有关“社会主义核心价值观”的阅读书目,下列小明推荐的书目中与本次征集不太贴切的是()

A.A

B.B

C.C

D.D

题型:多项选择题

某矩形断面轧件,轧制前的尺寸为H×B×L=90×90×150mm3,轧后的横断面尺寸为h×b=70×97mm2,求该道次的压下率。

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