【单选题】【消耗次数：1】
防水技术中，为提高混凝土密实度，应适当（ ）。
①
提高水泥用量、提高砂率和灰砂比
②
提高水泥用量、降低砂率和灰砂比
③
减低水泥用量、提高砂率和灰砂比
④
减低水泥用量、降低砂率和灰砂比
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相关题目
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蒸压灰砂砖（简称灰砂砖）是以（ ）。
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黏土、页岩、煤矸石为主要原料，经焙烧而成的主要用于非承重部位的空心砖
②
石灰和砂为主要原料，经坯料制备、压制成型，再经高压饱和蒸汽养护而成的砖
③
黏土、页岩、煤矸石为主要原料，经坯料制备、压制成型的砖
④
石灰和砂为主要原料，经焙烧而成的砖
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水泥胶砂强度检验方法(ISO法)规定，制备水泥胶砂试样的比例为水泥：标准砂：水=
①
1：3：0.5
②
1：3：0.45
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1: 2.5: 0.5
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1: 2.5: 0.45
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砂率是（ ）。
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每立方米混凝土中砂和砂石总质量之比
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每立方米混凝土中砂石质量之比
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每立方米混凝土中砂和水泥质量之比
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每立方米混凝土中砂和混凝土总质量之比
【单选题】
防水技术中，为提高混凝土密实度，应适当（ ）。
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提高水泥用量、提高砂率和灰砂比
②
提高水泥用量、降低砂率和灰砂比
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减低水泥用量、提高砂率和灰砂比
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减低水泥用量、降低砂率和灰砂比
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Thats pretty good that you get up and go running, but I ______ like running early in the morning since I’ve got to prepare breakfast for my family.
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have a good time
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have a hard time
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have time
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have much time
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It has been raining all day, but even though it______, we______there by tomorrow.
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didnt rain, couldn’t get
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hadn’t rained, couldn’t get
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didn’t rain, can’t get
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was; be set free
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be; be set free;
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be; was set free
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was; was set free
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ought to arrive
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should have arrived
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should arrive
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was supposed to arrived
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would have been
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had been
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is
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of buying the house
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with buying the house
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buying the house
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①
had done
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did
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would have done
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would do
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The old man is upset in fact today, but he looks as if he______ as happy as before.
①
will be
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were
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had been
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is
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to erect
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erecting
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be erected
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being erected
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The Bakers arrived last night. If they’d only let us know earlier,______at the airport.
①
we’d meet them
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we’ll meet them
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we’d have met them
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we’ve met them