柱面波是指波源为一无限长柱体,任意时刻的波阵面为一()。A、同轴圆柱面 B、平面 C

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问题:

柱面波是指波源为一无限长柱体,任意时刻的波阵面为一()。

A、同轴圆柱面

B、平面

C、同心圆球面

D、斜面

考点:无损探伤工无损探伤工(技师、高级技师)无损探伤工(技师、高级技师)题库
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甲数分解质因数是2×3×5,乙数分解质因数是3×5×7,甲乙两数的最小公倍数是______.

题型:单项选择题

根据句意及所给汉语、单词或首字母提示写出单词。

小题1:Our country is          (发展)faster and faster now.

小题2:          (无论哪里) you go, I will follow you.

小题3:What China has achieved in the past 30 years has   (使惊讶) the whole world a lot.

小题4:Since no one is          (缺席). Let’s begin our class.

小题5:This pair of jeans            (适合) me well. It is not too large or too small.

小题6:Do you know if Sydney is the           (首都) city of Australia?

小题7:Would you please              (答复) to my e-mail as soon as you receive it?

小题8:Is there anything            (奇怪) in today’s newspaper?

小题9:The food was good but the          (serve) was very slow.

小题10:Let’s have a     (discuss) with your partners. The question is a little difficult.

小题11:He is lying and there is not much             (true) in his words.

小题12:Do you know what clothing styles are              (fashion) these days?

小题13:I am very       (happy) these days because I have some problems with my Math.

小题14:It’s hard to give up            (smoke),but you have to.

小题15:We should be careful with fire for                (safe).

题型:单项选择题
下列说法中不正确的是(  )
A.圆周率π的值是圆周长与直径的比值
B.圆周率π的值是圆面积与直径的比值
C.圆周率π的值与圆的大小无关
D.圆周率π的值是一个无限不循环小数
题型:单项选择题

决定债券再投资收益的主要因素不包括( )。

A.市场利率的变化
B.息票收入
C.债券的偿还期限
D.资金的使用方向

题型:单项选择题

房地产开发企业取得的土地使用权用于建造对外出售的房屋建筑物的,其相关的土地使用权的价值不与地上建筑物合并计算其成本,而仍作为无形资产进行核算。 ( )

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