主页
学科
搜索
账户
常见问题
当前学科：初级面点工
题目：
单选
在①离心泵、②往复泵、③旋涡泵、④齿轮泵中，能用调节出口阀开度的方法来调节流量的有（）。
A . ①②
B . ①③
C . ①
D . ②④
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
夏季来临，某蜂场蜂群表现不安和虚弱，个体缩小，头尾发黑，失去飞翔能力。多数病蜂腹部膨大，下痢较重，污染隔板、巢房和箱壁。巢门前有病蜂缓缓爬行，掉在地上不久死去。不仅工蜂和雄蜂得病，蜂王也被感染如检查发现中肠呈乳白色或灰白色，环纹不明显并失去弹性。病蜂体内白球显著下降，比健康蜂减少50%左右。你认为还要做的检查是（）
社会经济制度和经济体制的区别在于（）
如果把零基准下滑信标的边带天线的高度升高，则实际下滑角会（）。
风电机组的电能质量、有功功率/无功功率调节能力检测以及电气模型验证，检测机构只出具（）。
心电图表现为：心率200次／分，节律规则，QRS波群形态正常，突发突止见于（）.
实验大楼安全出口的疏散门应（）。
有头疽火陷证多发生在（）
一台型号为32W-30型旋涡泵，其“32”代表泵的什么？
The ancient Greeks developed basic memory systems called Mnemonics. The name is(1)from their Goddess of Memory, Mnemosene. In the ancient world, a trained memory was an(2)asset, particularly in public life. There were no(3)devices for taking notes and early Greek orators (演说家) delivered long speeches with great(4)because they learned the speeches using Mnemonic systems. The Greeks discovered that human memory is(5)an associative process—that it works by linking things together. For example, think of an apple. The(6)your brain registers the word "apple", it(7)the shape, colour, taste, smell and(8)of that fruit. All these things are associated in your memory with the word "apple". (9). An example could be when you think about a lecture you have had. This could trigger a memory about what you were talking about through that lecture, which can then trigger another memory. (10). An example given on a website I was looking at follows: Do you remember the shape of Austria, Canada, Belgium or Germany? Probably not. What about Italy, though?(11)You made an association with something already known, the shape of a boot, and Italy's shape could not be forgotten once you had made the association.
1924年至1927年，一场以推翻帝国主义在华势力和北洋军阀为目标的革命运动，似滚滚洪流席卷中国大地。人们通常把它称为“大革命”或“国民革命”。1927年大革命失败后，中国共产党确定了（）的总方针。