计算下面各题:18+(78-512);413-2.5+134;23-19-29;

题型:解答题

问题:

计算下面各题:
1
8
+(
7
8
-
5
12
);
4
1
3
-2.5+1
3
4
2
3
-
1
9
-
2
9
〔16.8-(1.6+3.8)〕÷1.9;9.8×100.1;8.4÷3.5.
考点:分数的简便算法
题型:解答题

碳二加氢反应器采用多段床串联的目的是()。

A.提高催化剂活性

B.提高催化剂选择性

C.简化流程

D.节省投资

题型:解答题

阅读理解。

     Each child has his individual (个人的) pattern of social, as well as physical, development. Some of it

depends on his home life and his relationships with the people who love him. Children in large families

learn how to get along with others through normal brother- sister play and tussles (打斗). An only child,

on the other hand , may have to learn his lessons in social living through hard experiences on the

playground or in the classroom. Twins who always have one another to lean on may be slow in

responding to others because they do not need anyone else.

     A child who is constantly scolded and made to feel he does everything wrong may have a difficult

time developing socially. He may be so afraid of displeasing the adults around him that he keeps to

himself (where he can't get into trouble)or he may take the opposite route and go out of his way to create

trouble. Like the deserted child, he too may return to infantile (幼稚的) pleasures, developing habits that

will satisfy him, but create barriers (障碍) toward social contact.

1. Which of the following may have effect on children's paten of social development?

A. Age.  

B. Education  

C. Home life.  

D. Gender (性别)

2. Which of the following is implied by the passage?

A. Too much scolding of children may make their social development difficult.

B. All children developed in the same ways.

C. Children who are constantly scolded may learn to get along with others quickly.

D. Deserted children often exhibit quicker social development.

3. We can inferred from the passage that________.

A. continual scolding is not harmful to the child.

B. continual scolding holds back healthy social development.

C. continual scolding has no effect on obeying orders.

D. continual scolding has no effect on physical development

4.Where does the passage say the only child learns his social lessons?

A. School and home      

B. Home and playground

C. Classroom and playground  

D. All of the above

题型:解答题

在25℃时,氨水与盐酸混合后,若混合液中c(NH4+)=c(Cl-),则溶液pH(  )

A.大于7

B.小于7

C.等于7

D.无法判断

题型:解答题

痛痹的临床特征是

A.关节痛,游走不定

B.关节疼痛,红肿灼热

C.疼痛剧烈,痛有定处

D.痛重者,肌肤不仁

E.屈伸不利,心悸气短

题型:解答题

典型急性菌痢患者的粪便呈()

A.米汤水样便

B.柏油样黑便

C.少量黏液脓血便

D.果酱样腥臭便

E.灰陶土样便

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