一般地，以下哪种因素不会对塑料制品的飞边产生影响ˍˍ？

A. 注塑压力
B. 塑料收缩率
C. 塑料粘度
D. 保压压力

塑料的密度大约为ˍˍ。

A. 0.8～2.0g/cm^3
B. 8～20 g/cm^3
C. 比水大
D. 比水小

塑件产品图上没有标注公差时，可以按照MT7级精度转换尺寸后进行模具设计计算。

A. 对
B. 错

第4章 常用数据结构 课后习题P128 1-5题

Main ideaThe article tells us what __________to make before meeting visitors at_____________ .In addition, the article illustrates how to meet visitors in a __________ manner.

1. accept, acceptance, acceptablea. The terms of the contract are __________ to us.b. The new laws gained widespread _________________ .

2. satisfy, satisfactory, satisfactiona. We should _____________ the customers’ need.b. The reading ability of the students is _________ .

c. Please make an ____ about yourself.(introduction, introductory, introduce)

He_____a warm welcome to the foreign visitors.

The old man rose and made a_____speech.