造成黏冲的原因是 A．颗粒过干 B．压力不够 C．冲模表面粗糙_爱下问搜题

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问题单项选择题

造成黏冲的原因是

A．颗粒过干
B．压力不够
C．冲模表面粗糙
D．润滑剂使用过量
E．环境湿度过小

答案

参考答案：C

填空题

选词填空。

plant at in on flowers April May warm hot Because season

Spring is the best ___________ of a year. It's from March to ___________. A lot of ___________ come
out. It is windy and ___________. Spring is the best time to ___________ trees. I like spring best. ___________
my birthday is in spring. It's ___________ 18th.

解答题

直接写出得数． 87-78=	250÷5=	180+30=	66÷6=
560÷7=	28×3=	72÷2=	150×2=