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【多选题】
求解非线性方程组sin(x(1))+x(2)^2+log(x(3))-7=0;3*x(1)+2^x(2)-x(3)^3+1=0;x(1)+x(2)+x(3)-1=2.
A.
-0.4134
B.
2.61
C.
1.8034
D.
-1.3011
E.
2.7422
F.
1.5588
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【单选题】将一个大小为200G的视频文件,采用压缩比率为100:1标准压缩后,其容量为( )GB。
A.
200
B.
100
C.
2
D.
1
【单选题】— How long ____ you ____ in the country with your grandparents, Henry? — About four weeks. I'll return as soon as school starts. [     ]
A.
are; staying
B.
did; stay
C.
do; stay
D.
had; stayed
【判断题】偏好的改变导致人们的需求在某调需求曲线上向上或向下移动,而收入的变动则引起需求曲线的移动。
A.
正确
B.
错误
【简答题】将0.3mol NaCl固体与0.1mol CuSO 4 ·5H 2 O固体混合溶于水,配成1升混合液。然后取出200ml溶液,用石墨电极,通电一段时间(不考虑水解)。求Cl - 正好全部变为氯气逸出时,阴极上产生的气体体积(标准状况下)是多少?所得溶液的PH为多少(假设溶液体积不变)?
【单选题】I ______ the CDs to you if I have time tomorrow. [     ]
A.
will return
B.
returned
C.
have returned
D.
return
【单选题】双浮球式充电指示器,当视窗内圆显示红色,外圆显示蓝色时,表示____。
A.
电解液面及充电正常
B.
电解液面太高
C.
充电不足
D.
电解液面太低
【单选题】—Have you got any books on English grammar? I’d like to borrow . —Yes, here you are.But you must return it by Friday.
A.
it
B.
one
C.
some
D.
any
【简答题】一When did you learn the news that Obama made a trip to Canada as President? 一_______ was on my return. A.That B.It C.There D.This
【简答题】You type a word or phrase into an Internet search engine such as Google or Yahoo, hit return and in an instant, dozens of "hits" -Web sites containing words that match your query-appear on the compute...
【简答题】6分)将0.3mol NaCl固体与0.1mol CuSO 4 ?5H 2 O固体混合溶于水,配成1升混合液。然后取出200ml溶液,用石墨电极,通电一段时间(不考虑水解)。求Cl - 正好全部变为氯气逸出时,阴极上产生的气体体积(标准状况下)是多少?所得溶液的PH为多少(假设溶液体积不变)?
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