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【简答题】
梯子AB靠在墙上，其重为P＝200N，如图所示。梯长为l，并与水平面交角θ＝60°。已知接触面间的静摩擦因数均为0.25。今有一重650N的人沿梯上爬，问人所能达到的最高点C到A点的距离s多少?
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【单选题】《招标投标法》规定，对于依法必须进行招标的项目，招标人应给予投标人编制投标文件的合理期间，自招标文件开始发出之日起至投标人提交投标文件截止之日止，最短不少于（）d，同时，招标人对于已发出的招标文件进行澄清或修改，亦必须在要求提交投标文件截止时间以前（）d。
A.
20、10
B.
20、15
C.
30、15
D.
30、20
【单选题】听力原文：W: How can I go to the Summer Palace? M: Go straight ahead．and you'll see a bus stop there. Q: How does the woman go to the Summer Palace? (17)
A.
By car.
B.
By bus.
C.
By bike.
【简答题】图1所示基本共射放大电路中，已知 Ucc=12V, UBE= O. 7V, Rc = 3kΩ，β=50,rbb' =300Ω, C1和C2足够大。试求: (1)若静态时Uceq=6V ,Rb =? (2)不接负载时Au=? (3)若Rl=3kΩ，Au=?
【单选题】How do you understand metaphorically that Robert Frost enjoys “the straight crookedness of a good walking stick” in his metrical design?
A.
It means that Frost enjoys writing poetry with a tone that is crookedly straight.
B.
It means that Frost enjoys combining poetic meters with his speaking tone of voice in his poetry.
C.
It means that Frost enjoys writing poetry with a tone that is straightly crooked.
D.
It means that Frost enjoys writing poetry with a meter that is of straight crookedness.
【简答题】三极管接成图2-5所示电路，已知在图2-5(a)中，β=50，R b =475kΩ，R c =3kΩ，U CC =+15V。在图2-5(b)中，β=100，R b =260kΩ，R c =2kΩ，R e =500Ω，U CC =+10V。设三极管的U BE =0.7V，求电路的静态工作点。
【简答题】如何评价《天朝田亩制度》？
【简答题】How do straight-A students schedule their time ?
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