【单选题】等直杆的受力情况如图所示,则杆中的最大轴力和最小轴力分别为( )。
【简答题】设一个随机过程ζ(t)可表示成ζ(t)=2cos(2πt+θ),式中θ是一个离散随机变量,且P(θ=0)=1/2、P(θ=π/2)=1/2,试求Eζ(1)及R ζ (0,1)。
【单选题】?Read the following article about LG's success in India and the questions on the opposite page. ?For each question 15-20, mark one letter (A, B, C or D ) on your Answer Sheet for the answer you choose...
A.
become financially aggressive.
B.
win championship of marketing.
C.
achieve success in their careers.
D.
alter their way of doing business.
【单选题】Which of the following is NOT a fault that may slow the reader's speed?
A.
Some people read aloud.
B.
Some people follow the line with a finger or a pen.
C.
Some people do not exert themselves to read faster, or slow down as needed.
【简答题】如图所示,AB为倾角θ=37°的斜面轨道,轨道AC部分光滑,CB部分粗糙,一质量m=2 kg的小物块与斜面BC间的动摩擦因数μ=0.25;BP为圆心角等于143°,半径R=0.5 m的竖直光滑圆弧形轨道,两轨道相切于B点,P、O两点在同一竖直线上;轻弹簧一端固定在A点,另一端在斜面上C点处,已知sin 37°=0.6,cos 37°=0.8,g取10 m/s 2 。 (1)若小物块静止在弹簧上端,...
【单选题】下列属于大远景景别的是
A.
人物在画幅中的大小只占画幅高度关系的四分之一
B.
人物在画面上的高度大于画面1/2高度,至全身带地面。
C.
所摄入画框的范围是一个成年人头顶到膝盖或者到腰部的范围。
D.
被拍摄主体某个特定的不完整局部所构成的画面 透视人物、境遇的关键性细节。
【简答题】Read the following text. Choose the best word(s) for each numbered blank and mark [A] ,[B] , [C] or [D] on ANSWER SHEET1.What do you do to (21) care of the books in your library? Some of the most coll...
【简答题】Part C Directions: Read the following text carefully and then translate the underlined segments into Chinese. Your translation should be written carefully on ANSWER SHEET 2. (10 points) There is a mar...