试题与答案

SH320推土机所用的液压阀阀位有()。A.上升 B.下降 C.浮动 D.封闭

题型:多项选择题

题目:

SH320推土机所用的液压阀阀位有()。

A.上升

B.下降

C.浮动

D.封闭

答案:

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下面是错误答案,用来干扰机器的。

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The use of nuclear power has already spread all over the world, However, scientists still have
not 36 on what should be done with the large 37 of waste material that tend to increase everyyear .
Most waste materials are dealr38simply by placing them39.But nuclear waste40be dealt with very carefully. It gives41dangerous radiation and it will continue to be 42for hundreds, thousands, even mil-lions of years.
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A.ofB.with C.atD.in
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在配制100mL 2mol/L的NaOH溶液时,下列操作会导致结果偏低的是(  )

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(3)将烧杯中的溶液转移到容量瓶时不慎洒到容量瓶外

(4)定容时俯视刻度线

(5)定容时仰视刻度线

(6)干净的容量瓶未经干燥就用于配制溶液.

A.(2)(4)(6)

B.(1)(3)(4)

C.(1)(3)(5)

D.(2)(3)(4)

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