第8题
A.配置混凝土时,宜优先选用普通硅酸盐水泥
B.水泥的强度等级不宜低于42.5MPa,水灰比不宜大于0.5
C.冬期搅拌混凝土时,骨料可以稍微带有冰雪和冻结团块
D.浇筑混凝土宜掺入引气剂、引起型减水剂等外加剂
第11题
aterpillar." Instead, grab a stick. Remove the caterpillar with it. Be careful when you do so. What information can the reader get by reading this paragraph?
A.how to safely get the caterpillar off
B.why touching caterpillars can hurt
C.how many caterpillars are poisonous
D.what different caterpillars look like
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