电缆在桥架内敷设时，电缆总截面面积与桥架横断面面积之比，电力电缆不应大于（），控制电

Harry, Tony, Collins, Jesse和Jack 几位同学欲提高学习成绩，故针对自己的情况上网找寻适合自己学习方法与资料。

首先，请阅读下面网页上信息。

A. Study Skills Self-help Information - Virginia Tech - Articles and self-assessment tests covering scheduling and time management, memory techniques, note-taking, reading, and setting up a good studying environment.

B. Academic Tips - Helping students manage time, take better notes, study more effectively, improve memory, take tests and handle the stresses of senior life.

C. Neuromod - Online Memory Improvement Course - It is possible to improve one’s memory performance in specific areas by applying memory techniques. This site explain a number of systems ranging from simple to sophisticated. The training steps are clearly laid out and in most cases online training software is provided.

D. Studying Revising Exams - One-page summary of studying, examination, and writing techniques. A collection of articles about good study habits with how-to suggestions.

E. Learning Skills - University of Victoria - Copyrighted e-books with tips on organizing notes, reading, time and study management, exam preparation and writing, writing assignments, and study strategies.

F. Study Guides  - Collection of academic study guides. Topics include classroom and study preparations; studying, writing and reading skills; math and science skills; evaluating and using web content; and preparing for tests. Authored, maintained, and revised by Joe Landsberger.

现在，请阅读下面的信息，根据他们的实际情况，进行信息匹配。请在答题卡上将对应题号的相应选项字母涂黑。其中F用CD代表。

小题1: Tony wants to better himself by means of taking notes, time management and so on. He also feels like solving the problem of heavy pressure in study.

小题2: Harry wants to improve himself through the ways of time management, memory skills etc., especially he can check himself in time and can find himself better learning surroundings..

小题3: Jesse will find some suggestions on how to make notes and how to do his writing homework.

小题4: Collins focuses on his future exams, so he would like to get some instructions for his science study and use some materials on the Net.

小题5: Jack hopes to train himself systematically to keep what he learns in mind a longer time.

变直径圆管流，细断面直径d₁，租断面直径d₂=2d₁，粗细断面雷诺数的关系是：（）.

A.Re₁=0.5Re₂

B.Re₁=Re₂

C.Re₁=1.5Re₂

D.Re₁=2Re₂

男性，60岁，便秘，间断便血20余天，便后不尽感，诊断首先考虑为（）。

A.直肠部分脱出

B.直肠癌

C.外痔

D.血栓外痔

E.内痔脱出

YB45包装机运行中，商标纸横向输送模盒左、右探射光垒之一在设定有商标纸相位未检测到商标纸的存在则显示“（）”故障。

A.盒片吸取失效

B.盒片吸取探测阻塞

C.盒片停吸失效

D.盒片钢印检测错误

喷气发动机的单位耗油率是指产生一单位推力每小时所消耗的燃料，单位是（）。

A、kg/（N·h）

B、kg/（KN·h）

C、kN/（W·h）

D、N/（kg·h）