切削加工时,工件材料抵抗刀具切削所生产的阻力称为()。   A.切削力 B.作用力

题型:单项选择题

问题:

切削加工时,工件材料抵抗刀具切削所生产的阻力称为()。  

A.切削力

B.作用力

C.切削抗力

D.摩擦力

考点:电力机车钳工电力机车钳工(中级)电力机车钳工(中级)题库
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受精的鸟卵在雌鸟体内开始发育,但鸟卵产出后就暂停发育,原因是外界   (   )

A.具有阳光

B.具有空气

C.温度太低

D.温度太高

题型:单项选择题

急性化脓性根尖周炎时,下列哪种排脓方式对根尖周组织破坏最小

A.通过根尖孔经根管从冠部缺损处排脓
B.通过牙周膜从龈沟或者牙周袋排脓
C.通过骨髓腔突破骨膜、皮肤向外排脓
D.通过骨髓腔突破骨膜、黏膜向外排脓
E.突破鼻底黏膜向鼻腔排脓

题型:单项选择题

对于单纯固定资产投资项目而言,下列计算式不正确的是( )。

A.运营期某年所得税前净现金流量=该年因使用该固定资产新增的息税前利润+该年因使用固定资产新增的折旧+该年因回收的固定资产净残值
B.运营期某年所得税后净现金流量=运营期某年所得税前净现金流量-该年因使用该固定资产新增的息税前利润×所得税税率
C.运营期某年所得税后净现金流量=该年因使用该固定资产新增的税前利润×(1-所得税税率)+该年因使用固定资产新增的折旧+该年回收额-该年维持运营投资
D.建设期某年净现金流量=-该年发生的固定资产投资额。

题型:单项选择题

关于突触传递的叙述,正确的是()。

A.双向传递

B.不易疲劳

C.突触延搁

D.不能总和

E.刺激停止后,传出冲动也立即停止

题型:单项选择题

Valentine’s Day was the time my father chose to show his love for the special people in his life. Over the years I fondly thought (31) him as my "Valentine man".

My first recollection of the magic he could bring to Valentine’s Day came when I was six. That morning at the breakfast table I found a card and a gift-wrapped package at my chair. The card was (32) "Love, Dad" and the gift was a ring with a small piece of red glass to represent my birthstone, a ruby.There is (33) difference between red glass and rubies to a child of six, and I remember wearing that ring with pride that all the cards in the world (34) not surpass.

As I grew older, the gifts gave (35) to heart-shaped boxes filled with my favorite chocolate and always included a (36) card signed "Love,Dad". In those years my thank-you became more of a perfunctory response. The cards seemed less (37) , and I took for granted that the Valentine would always be there. I had (38) my hopes and dreams in receiving cards and gifts from "significant others" and "Love, Dad" just didn’t seem quite enough.His final card remains on my desk today. It’s a (39) of how special fathers ean be and how important it has been to me over the years to know that I had a father who continued a tradition of love with simple acts of understanding and an ability to express happiness over the people in his life.Those things never (40) , nor does the memory of a man who never tried being my Valentine.

37()。

A. important

B. beautiful

C. familiar

D. standard

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