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【简答题】
高层建筑采用分区减压给水,为了防止底层水管压力过大管道上安装 。
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举一反三
【单选题】—Why do people there _______use umbrella in the sun ? ---Because they would rather enjoy the sunshine .
A.
hardly
B.
often
C.
always
【单选题】Why was it once thought that no spacecraft would survive for very long in space?
A.
People believed that spacecraft would be destroyed in a black hole.
B.
People believed that spacecraft would be misguided by missiles.
C.
People believed that spacecraft would be collided with a star.
D.
People believed that spacecraft would be damaged by meteorites.
【单选题】可以用直接法配制标准溶液的是 : ( )。
A.
含量为 99.9% 的 NaOH
B.
优级纯浓 H 2 SO 4
C.
含量为 99.9% 的锌片
D.
分析纯 NH4SCN
【单选题】下列对于真核细胞核染色体DNA复制的描述中哪一项是不正确的
A.
复制中冈崎片段的长度与原核细胞大小基本相同
B.
复制过程中涉及到组蛋白的合成
C.
复制的延长发生DNA聚合酶的转换
D.
增殖细胞核抗原在真核生物复制和延长过程中具有关键作用
E.
与细胞周期有关
【简答题】要使冷冲压模具正常而平稳地工作,必须要求 与模柄的轴心线要求 (或偏移不大)。
【单选题】Why can many people see “silver linings” to the economic showdown?
A.
They would benefit in certain ways.
B.
The stock market shows signs of recovery.
C.
Such a slowdown usually precedes a boom.
D.
The purchasing power would be enhanced.
【单选题】A good title for this article would be ______.
A.
Why Do People Marry?
B.
Marriage Customs in India Are Changing
C.
Why Indians Read the Sunday Newspaper?
D.
Living Abroad
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