多项选择题

大体积混凝土浇筑时控制混凝土水化热温度的常用方法是（）。

A.优先采用水化热较低的水泥
B.用改善集料级配、.降低水灰比、掺加混和料、掺加外加剂等方法减少水泥用量
C.控制浇筑层厚度和进度，以利散热
D.控制浇筑温度，设测温装置，加强观测，作好记录
E.可适量增加砂、砾石

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单项选择题

There is no one method to choose an appropriate topic for an argumentative – or any other kind of – essay. However, there are still some guidelines supposed to be obeyed. One of the crucial principles relates to whether a selected topic is debatable. Please select from the following example topics the one that is debatable. A、The benefits of exercise B、Whether exercises should be unduly recommended C、Exercise has many benefits D、---

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