| No one knows how man learned to make
words. Perhaps he began by making sounds like those made by animals. Perhaps he
grunted like a pig when he lifted something heavy. (78) {{U}}Perhaps he made
sounds like those he heard all round him--water splashing, bees humming, a stone
falling to the ground. {{/U}}Somehow he learned to make words. As the centuries
went by, he made more and more new words. This is what we mean by
language. People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life. The words you know are called your vocabula A. 150 B. 1,500 C. 5,000 D. 4,000 [单项选择]盲人失去视觉，通过实践活动反而使听觉比正常人更敏锐，这是（ ）
A. 感觉对比 B. 感觉适应 C. 联觉 D. 感觉补偿 [单选题]下列关于稳压泵的说法，不正确的是（ ）。
A.稳压泵宜采用单吸单级或单吸多级离心泵 B.稳压泵应设置备用泵 C.稳压泵吸水管应设置明杆闸阀或带启闭刻度的暗杆闸阀 D.稳压泵出水管应设置消声止回阀和明杆闸阀 [多选题]钢丝绳的选用应符合现行国家标准《钢丝绳》GB./T8918 的规定,下列说法正确的是:(ABCD)
A.自升平台钢丝绳直径不应小于 8mm,安全系数不应小于 12。 B.提升吊笼钢丝绳直径不应小于 12mm,安全系数不应小于 8。 C.安装吊杆钢丝绳直径不应小于 6mm,安全系数不应小于 8。 D.缆风绳直径不应小于 8mm,安全系数不应小于 3.5 E.当钢丝绳端部固定采用绳夹时,绳夹规格应与绳径匹配,数量不应少于 5 个,间距不应小于绳径的 12 倍 [单选题]加工大直径深孔,一般采用钻、扩、镗和()的方法。
A.研 B.磨 C.铰 D.铣 [单项选择]JIT对生产准备时间的要求（）。
A. 尽可能多 B. 尽可能少 C. 完全没有 D. 要求不严格 [名词解释]演示法
[填空题]制动软管总成检修时，软管垫须更换为（ ）。
[单项选择]设某国家某时流通中通货为1500亿元，中央银行法定存款准备金率为7%，商业银行的存款准备金为500亿元，存款货币总量为4000亿元。
请根据以上资料回答下列问题： 该国当时的货币乘数为( )。 A. 2.00 B. 2.75 C. 3.00 D. 3.25 我来回答: 提交
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