[单选题]一阶电路的零输入响应中，当RC电路（ ）时，电路进入新的稳态。
A.t≥4τ
B.t≤5τ
C.t≥2τ
D.t≤4τ

[单项选择]婴儿碳水化合物提供的能量应占总能量的（）。
A. 10%
B. 20～40%
C. 30～60%
D. 70%

[多选题]以下业务开展前需上报总行授信审查委员会申请开办权的有( )
A.惠商贷;
B.惠企贷;
C.创业担保贷款 ;
D.政采速贷;
E.助企小微贷

[填空题]
Check out the io Personal Digital Pen launched by Logitech. It’s a magic pen that can store everything you write and transfer it to your computer. And you don’t have to lug a hand-held device along with you for it to work.
Logitech’s technology works like this: The pen writes normally, using normal ballpoint pen ink. But while you are writing, a tiny camera inside the pen is also taking 100 snapshots per second of what yon are doing, mapping your writing via a patchwork of minute dots printed on the paper. All this information the movement of your pen on the paper, basically is then stored digitally inside the pen whether you are writing notes or drawing complex diagrams. You can store up to 40 pages worth of doodles in the pen’s memory. As far as you are concerned, you are just using a normal pen.
It is only when you drop the pen into its PC-connected cradle that the fun begins. Special s

[单选题]装设于地面的配电变压器应设有安全围栏，并悬挂（）等标示牌。
A.“止步，高压危险！”
B.“禁止攀登，高压危险！”
C.“从此上下！”
D.“有电危险！”
E.略
F.略

[单项选择]我国经济体制改革的中心环节是( )。
A. 金融制度改革
B. 建立市场经济体制
C. 国有企业改革
D. 政治体制改革

[判断题]鸡里脊俗称为鸡牙子。（ ）
A.正确
B.错误

[单项选择]
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。