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【单选题】
算术均数和中位数相比,算术均数A.
抽样误差更大
B.
不易受极端值的影响
C.
更充分利用数据信息
D.
更适用于偏态分布的资料
E.
更适用于分布不明确的资料
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举一反三
【单选题】根据下面短文内容，回答题。 The Tough Grass that Sweetens Our Lives 第46题___________ 查看材料
A.
Eventually， a commercial plant was developed which was 5 percent sweeter than before，but also much stronger and less likely to die from disease.
B.
One major gene has been identified by Dr Angelique D'Hont and her team in Montpelier，France.
C.
Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.
D.
Since the 1960s， scientists have been analyzing the mysteries of the sugar cane's genetic code.
E.
The majority of the world's sugar now comes from this particular commercial species.
F.
Unfortunately， however， the plant started to become weaker and more prone to disease.
【简答题】我市汉江崔家营航电枢纽工程项目是以航运为主、兼有发电、灌溉、供水、旅游等综合效益的项目．该枢纽拦水坝长1242m，发电机组5台，装机容量8.8×10 4 kW，正常蓄水位62.7m．则正常蓄水时坝底受到水的压强是______Pa．拦水坝使上游水位升高，这样可以提高水的______能．（g取lON/kg）
【多选题】以灌溉为主，兼有发电、给水、航运等任务的水库，应按设计规定首先满足灌溉任务，并兼顾发电、给水、航运等。在编制供水计划和实际调度时，应注意：（）。
A.
合理安排灌溉用水方式，降低供水高峰
B.
充分利用灌区内的蓄水工程
C.
在非灌溉期或非用水高峰时提前充蓄
D.
在用水高峰时，灌区内的蓄水工程可与水库共同供水
【单选题】听力原文： Good morning, students. I hope you have read the two books about speech. Today's lecture deals with the presence of the unusually large deaf population that existed on the Massachusetts island o...
A.
At the library.
B.
In a lecture hall.
C.
On Martha's Vineyard.
D.
At a telephone laboratory.
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