五月中、下旬第二代槐红蜘蛛的若虫危害，这时虫态较（），以后世代重叠。A.整齐 B.平

将代数式x²+4x-1化成（x+p）²+q的形式为[ ]

A.（x-2）²+3

B.（x+2）²-4

C.（x+2）²-5

D.（x+2）²+4

ITP做骨髓检查的主要目的是（）。

A.证明有无巨核细胞增生

B.证明有无幼稚巨核细胞

C.证明有无血小板减少

D.排除引起血小板减少的其他疾病

E.上述均不是

以下两种物质混合后不会发生反应自热着火的是( )。

A．甲醇遇氧化钠

B．氧气和氢气混合

C．甘油遇高锰酸钾

D．乙炔与氯气混合

However important we may regard school life to be, there is no denying the fact that children spend more time at home than in the classroom. Therefore, the great influence of parents cannot be ignored or discounted by the teacher. They can become p allies of the school personnel or they can consciously or unconsciously hinder and frustrate curricular objectives.

Administrators have been aware of the need to keep parents informed of the newer methods used in schools. Many principals have conducted workshops explaining such matters as the reading readiness program, manuscript writing and developmental mathematics.

Moreover, the classroom teacher, with the permission of the supervisors, can also play an important role in enlightening parents. The informal tea and the many interviews carried on during the year, as well as new ways of reporting pupils’ progress, can significantly aid in achieving a harmonious interplay between school and home.

To illustrate, suppose that a father has been drilling Junior in arithmetic processes night after night. In a friendly interview, the teacher can help the parent sublimate his natural paternal interest into productive channels. He might be persuaded to let Junior participate in discussing the family budget, buying the food, using a yardstick or measuring cup at home, setting the clock, calculating mileage on a trip and engaging in scores of other activities that have a mathematical basis.

If the father follows the advice, it is reasonable to assume that he will soon realize his son is making satisfactory progress in mathematics, and at the same time, enjoying the work.

Too often, however, teachers’ conferences with parents are devoted to petty accounts of children’s misdemeanors, complaints about laziness and poor work habits, and suggestion for penalties and rewards at home.

What is needed is a more creative approach in which the teacher, as a professional adviser, plants ideas in parents’ minds for the best utilization of the many hours that the child spends out of the classroom. In this way, the school and the home join forces in fostering the fullest development of youngsters’ capacities.

The central idea conveyed in the above text is that（）

A.home training is more important than school training because a child spends so many hours with his parents

B. teachers can and should help parents to understand and further the objectives of the school

C. there are many ways in which the mathematics program can be implemented at home

D. parents have a responsibility to help students in doing homework

气雾剂中的附加剂不包括（）

A.潜溶剂

B.润湿剂

C.渗透压活性物质

D.乳化剂

E.矫昧剂