划分沥青混合料是否属于粗粒式沥青混合料的指标是()。A.组成结构  B.矿料级配

题型:单项选择题

问题:

划分沥青混合料是否属于粗粒式沥青混合料的指标是()。

A.组成结构 

B.矿料级配 

C.矿料最大粒径 

D.矿料最小粒径

考点:公路工程2B320000公路工程项目施工管理2B320000公路工程项目施工管理题库
题型:单项选择题

甘草皂苷结构属于

A.离子交换色谱
B.聚酰胺色谱
C.葡聚糖凝胶G
D.大孔吸附树脂
E.硅胶或氧化铝吸附色谱选择合适的色谱条件分离下列各组化合物

题型:单项选择题

阅读理解。

     Once there was a little boy who had a bad temper. His father gave him a bag of nails (钉子) and

told him that every time he lost his temper (脾气), he must hammer (用锤敲打) a nail into the back of

the fence (栅栏). The first day the boy had driven 37 nails into the fence. Over the next few weeks, as

he learned to control his anger, the number of nails hammered daily gradually (逐渐地) dwindled down.

He discovered it was easier to hold his temper than to drive those nails into the fence. Finally the day

came when the boy didn't lose his temper at all. He told his father about it and the father suggested that

the boy now pull out one nail for each day that he was able to hold his temper. The days passed and the

young boy was finally able to tell his father that all the nails were gone. The father took his son by the

hand and led him to the fence. He said, "You have done well, my son, but look at the holes in the fence.

The fence will never be the same. When you say things in anger, they leave a scar just like this one, You

can put a knife in a man and draw it out. It won't matter how many times you say I'm sorry, the wound is

still there. A verbal wound is as bad as a physical (身体的) one." As William Arthur Ward once said,

"It is wise to direct your anger towards problems not people, to focus your energies on answers not

excuses. "

1.  When the boy lost his temper, he must    ___    as his father told him.

A. break some plates and glasses

B. pull out one nail of the back of the fence

C. hammer a nail into the back of the fence

2.  Underlined expression dwindled down means     __    .

A. become gradually smaller

B. become gradually larger

C. get more and more

3. When the boy finally told his father that all the nails were gone, his father    ___   .

A. took him to the fence and look at the holes

B. asked him to pull out one nail of the back of the fence

C. asked him to focus your energies on excuses

4. Which of the following about the boy is WRONG

A. The first day the boy had driven 37 nails into the fence.

B. The boy found it was easier to drive nails into the fence than to hold his temper.

C.  The number of nails hammered daily became smaller and smaller.

5. We can infer from the passage that     _       .

A. the boy still had a bad temper at last

B. the boy began to know a verbal wound was nothing serious

C. the boy learnt to how to control his temper and settle the problems

题型:单项选择题

圆管紊流粗糙区(阻力平方区)的沿程摩阻系数λ与()。

A.雷诺数Re有关

B.相对粗糙度ks/d有关

C.Re和ks/d有关

D.Re和管长l有关

题型:单项选择题

冠状动脉痉挛引起的变异型心绞痛不宜用()。

A.普萘洛尔

B.硝苯地平

C.利多氟嗪

D.莫索尼定

E.硝酸甘油

题型:单项选择题

下列关于血脂的说法错误的是()

A.血脂的主要成分是胆固醇、甘油三酯、磷脂、游离的脂肪酸

B.右图为脂蛋白的结构示意图,①是胆固醇,②是磷脂,③是蛋白质

C.脂蛋白中,甘油三酯的主要携带者是乳糜微粒和极低密度脂蛋白

D.降脂药物可分为降胆固醇药、降甘油三酯药、降总胆固醇兼降甘油三酯药,还有升高低密度脂蛋白的药物等

更多题库