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【单选题】
听力原文: Harvard President Lawrence Summers announced a plan today to improve conditions for female scientists at the university. Summers said Harvard would spend fry million dollars over the next ten years to implement the recommendations of two committees that had been studying the issue since February. Summers has been under fire since he made remarks suggesting that women may not have the aptitude for science and mathematics that men have. What's announced by Harvard President?
A.
Women may not have the aptitude for science and mathematics that men have.
B.
A plan to improve conditions for scientists.
C.
A plan to improve the conditions of the university.
D.
A plan to improve conditions for female scientists.
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【判断题】图案在简化中要注意两点:一是抓住对象的基本特征,将其外形轮廓删繁就简,强调对象的最主要特征。二是各种物象起伏,明暗层次的简化,使原本立体的物象平面化。
A.
正确
B.
错误
【单选题】25· 一艘方形系数为0.8左右的平吃水船,若调为首倾1%L后,其旋回初径将( )。(L为船长)
A.
增大10%
B.
增大5%
C.
减小10%
D.
不变
【单选题】根据男女恋爱中的基本道德要求,恋爱应以( )
A.
个人纵欲为目的
B.
排遣孤独为目的
C.
寻找和培养爱情为目的
D.
丰富与异性交往的经验为目的
【单选题】根据男女恋爱中的基本道德要求,恋爱应以
A.
个人纵欲为目
B.
排遣孤独为目的
C.
寻找和培养爱情为目的
D.
丰富与异性交往的经验为目的
【单选题】Gary rides on the donkey when he gets tired.
A.
True
B.
False.
【判断题】货物运输的原则是“及时、准确、经济、方便”。
A.
正确
B.
错误
【单选题】结核分枝杆菌分裂一次所需的时间约为
A.
20min
B.
1h
C.
10h
D.
18h
【简答题】调频波的调制信号为AcosΩt,载波信号为v c (t)=V cm cos2π×10 6 t,已知调频器调制特性为线性,求: (1)当A=3V,Ω=2π×10 3 rad/s时,频偏为△ω=4π×10 3 rad/s,求该调频信号的有效带宽为多少? (2)当A=3V,Ω=4π×10 3 rad/s和A=6V,Ω=4π×10 3 rad/s时,有效带宽又为多少?频偏各为多少?
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