常规地震剖面的纵坐标代表的含义是()。A.地层埋深 B.海拔标高 C.地震波从地面到

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问题:

常规地震剖面的纵坐标代表的含义是()。

A.地层埋深

B.海拔标高

C.地震波从地面到某界面传播所需的单程旅行时

D.地震波从地面到某界面传播所需的双程旅行时

考点:大学试题石油科学石油科学题库
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One day while a girl was walking in the woods she found two starving songbirds. She took them home and put them in a small (31) . She cared for them and felt great love for them.

Once the (32) and per of the two birds flew from the cage. Therefore, (33) he flew close, she grasped him (34) . She felt glad, but suddenly she felt the bird go limp. She opened her hand and (35) in horror at the dead bird.

She noticed the other bird moving back and forth on the edge of the cage. She could feel his great need for (36) . She lifted him from the cage and (37) him softly into the air. The bird circled once, twice, three times.

The girl watched delightedly at the bird’ s enjoyment. Her heart was no longer (38) with her loss. Suddenly the bird flew closer and (39) softly on her shoulder. It sang the sweetest melody that she had ever heard.

The fastest way to (40) love is to hold on it too tightly, while the best way to keep love is to give it WINGS!

(40)()

A.freedom

B.food

C.love

D.space

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2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源.X射线是一种高频电磁波,若X射线在真空中的波长为λ,以h表示普朗克常量,c表示真空的光速,以E和m分别表示X射线每个光子的能量和质量,则(  )

A.E=,m=0

B.E=,m=

C.E=,m=0

D.E=,m=

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3根以上绝缘导线穿同一根管时,导线的总截面不应大于管内净面积的40%,当管子没有弯(90°~105°)时,其长度不超过30m。()

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不在公司担任具体管理职务的董事,因履行职责到达公司现场的时间每年应当不少于()。

A、7天

B、10天

C、7个工作日

D、10个工作日

题型:单项选择题

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