下列不属于提高混凝土耐久性措施的是( )。A.根据工程所处环境及使用条件，合理选...

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【单选题】

下列不属于提高混凝土耐久性措施的是( )。

根据工程所处环境及使用条件，合理选择水泥品种

使用减水剂、引气剂等外加剂

严格控制水灰比

尽量减少单位水泥用量

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【单选题】The plant called the scarlet gilia can have either red or white flowers. It had long been thought that hummingbirds, which forage by day, pollinate its red flowers and that hawk-moths, which forage at...

Uncovered scarlet gilia flowers, whether red or white, became pollinated at approximately equal rates.

Some red flowers of the scarlet gilia that remained uncovered at all times never became pollinated.

White flowers of the scarlet gilia that were covered at night became pollinated with greater frequency than white flowers of the scarlet gilia that were left uncovered.

Scarlet gilia plants with red flowers covered by day and scarlet gilia plants with white flowers covered at night remained unpollinated.

In late August, when most of the hummingbirds had migrated but hawkmoths were still plentiful, red scarlet gilia plants produced fruit more frequently than they had earlier in the season.

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【简答题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在_________ 分裂过程中。

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【判断题】Part 1 Decide whether the following statements are true or false. Write T for true and F for false.

正确

错误

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【单选题】The majority of other books on plant taxonomy are either less concise or more ________.

s pecialized

patient

modified

appreciative

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【单选题】、2015U2-63男,68岁反复咳嗽、咳痰15年, 加重伴发热3天。吸烟史40年, 1包/天。查体: T38.8°C,口唇发绀。桶状胸,双肺可闻及哮鸣音和湿啰音。血WBC10.3x109/L,N 0.85。该患者最可能的诊断是

支气管肺癌

肺血栓栓塞

慢性阻塞性肺疾病

支气管扩张

支气管哮喘

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【单选题】将来可以用来精确测量哈勃常数但现在精度不高的方法是什么( )

超新星

CMB

造父变星

引力波

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【单选题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在________过程中

有丝分裂

减数分裂

体细胞分裂

无丝分裂

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【简答题】编程题:算数运算请编写一段程序,完成以下功能: 1. 写一段程序,实现内存30H开始的两个字数的求和和求差的运算,和值存入内存50H开始的单元,差值存入外存30H开始的单元。(求和考虑进位) 2. 写一段程序,实现内存30H开始的两个字节数的求积运算,运算结果存入数据缓冲区60H开始的单元。 3. 写一段程序,实现内存30H开始的10个字节数的求和的运算,和值存入外存50H开始的单元(考虑进位)...

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【简答题】Listen to Part 2 and decide whether these statements are True or False.

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【简答题】Either the plant or the flowers will lose ____________ freshness.A. his B. its C. theirs D. their

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Some red flowers of the scarlet gilia that remained uncovered at all times never became pollinated.

White flowers of the scarlet gilia that were covered at night became pollinated with greater frequency than white flowers of the scarlet gilia that were left uncovered.

Scarlet gilia plants with red flowers covered by day and scarlet gilia plants with white flowers covered at night remained unpollinated.

In late August, when most of the hummingbirds had migrated but hawkmoths were still plentiful, red scarlet gilia plants produced fruit more frequently than they had earlier in the season.

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【简答题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在_________ 分裂过程中。

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