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问题 单项选择题

配制高强混凝土，应优先选用（）。

A、矿渣水泥

B、火山灰水泥

C、粉煤灰水泥

D、硅酸盐水泥

答案

参考答案：C

写作题
书面表达。
     以下是Jack下周末的活动计划，请根据表中的信息描述他下周末的活动。
Date
Saturday
morning
Saturday
afternoon
Saturday
evening
Activities
do my
homework
clean
theroom
go to the
library
Date
Sunday
morning
Sunday
afternoon
Sunday
evening
Activities
play
football
help my
mum
watch TV
Jack is going to have a busy weekend.                                                            
                                                                                                                        
                                                                                                                         
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问答题 简答题

加热修复手机信号理论依据是什么？
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