Schools should not assign or ask students to do homework via mobile phones and they should set up public phones and teacher hotlines for communication between parents and students, it added.

To Explore an Effective Way to Environmental Education by the Headteacher

班主任开展环境教育的有效途径探讨

Both species number and abundance of the metazoan zooplankton were dominated by the small-sized species, and decreased with body mass, while biomass distribution had a peak in the medium size class, 4.39 μ g to 8.78 μ g.

后生浮游动物的种类和数量均是以小个体为主，并且随着体重增大逐渐减少，而生物量则在4·39~8·78μg这一中等个体体重的位置上出现峰值。

The primary transcription product of nonclassical human major histocompatibility complex class I molecule HLA G is spliced to form at least seven different mRNA isoforms.

HLA G属非经典的HLA I类抗原，其初级转录产物经过不同的剪接方式形成至少7种亚型。

PET/ PEN at various compositions all show a single class transition temperature T g, Which means PET and PEN were miscible in amorphous phase.

结果表明，不同比例的PET/PEN都呈现出一个玻璃化温度，即PET、PEN在无定形态是相混溶的；

Based on the structure of non-reducible polynomial'f ( x) power chain, this paper puts forward unabridged proving process of the sequences'period and translation equivalence class in the G ( f~ e).

以不可约多项式f（x）的幂链的构造为基础，给出了G（fe）中序列的周期及平移等价类定理的完整证明过程。

A Class of Modifiable G~ 1-Continuous Piecewise Cubic Polynomial Curve

一种分段三次插值函数一类可调控的G~1连续分段三次多项式曲线

On Class Communication IMMUNOGLOBULIN G SUBCLASS DEFICIENCY

免疫球蛋白G亚类缺陷病

Discussion on Action Research The Research of Class Test in g

类测试技术研究论网络行政行为

The hydration process of the oil well cement of class G treated with different additives ( dispersant. retarder, fluid loss controller and latex) are investigated by determing the changes in the cement filtrate composition, in the particle size distribution and in the liquid phase conductivity.

通过测定加有不同外加剂的水泥浆滤液离子组成、讨论滤液中颗粒尺寸分布、测定水泥浆液相电导，分析了加有不同外加剂的水泥水化历程；

The hydration rate of Class G net oil-well cement slurry and the slurry with retarder tartaric acid is measured respectively by the methods of electrical conductance and acidity, and then the retardation mechanism of tartaric acid is discussed.

本文采用电导法和酸度法研究了嘉华G级油井水泥浆及加有缓凝剂酒石酸时水泥的水化历程，并对酒石酸的缓凝机理进行了分析。

Characteristics of hydration and hardening process and strength properties of class G oilwell cement pastes with and without sand were studied under different temperatures by XRD, SEM, static gel Strength analysis and penetrability test.

研究了G级油井水泥在不同温度条件下的水化硬化特点及强度性能.使用静态浸泡的实验方法，考察了薄膜对合金耐蚀性的影响。

In this paper, the structure of the fixed subrings of a class G θ-group ring is studied. The properties about the finite block theory and chain conditions of such fixed subrings are also discussed.

研究一类Gθ-群环的固定子环的结构，并讨论了此类固定子环的有限块理论及链条件等有关性质。

So critical temperature of strength decline, optimum amount of sand added to cement slurry, rule of properly controlling slurry properties and properly choosing additives are determined for Jiahua Class G Oilwell Cement.

从而达到实现确立嘉华G级油井水泥的强度衰退临界温度及合理加砂量、浆体性能的合理调控原则及外加剂的合理选配等目的。

For deep well cementing, provided a foundation for optimization and designing appropriate cement slurry composition based on Jiahua Class G Oilwell cement.

为进一步优选和设计以G级水泥为基础的深井水泥浆体系建立依据。

The relation between tetrahedral configuration ( SiO_4) and compression strength of class G cement

水泥中（SiO4）~4-四面体聚合态结构与抗压强度的关系

Hydration kinetic model and reaction formulas of Class G cement for 25-200C temperature range are established.

建立了水泥水化动力学模型及化学反应式；

A dual mode charge pump to produce an adaptive power supply for a class G audio power amplifier is presented.

本文设计了一种给G类音频功率放大器提供自适应电源的双模电荷泵电路。

Mathematical model for structure and compressive strength of hardened class G oilwell cement paste at low temperature

低温下油井水泥石孔结构与抗压强度的关系

Hydration, Hardening and Properties of Class G Oilwell Cement

G级油井水泥的水化硬化及性能

The Fixed Subrings of a Class G~ θ-Group Ring

一类G-~θ群环的固定子环