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政策性银行实行       的原则。  

I was worried about my maths, but Mr. Brown gave me an A.          .

Some people who don’t like to talk much are not necessarily shy；they        just be quiet people.

But for their help，we         the program in time

         a certain doubt among the people as to the practical value of the project

—Glad to meet you again. How are you? —I'm just             .（老样子）

—Let me introduce myself. I'm Albert. —          .

What’s the problem with your bike? ----                          .

一线段的正投影长度             ，以下说法正确的有(             )。

电路如图9所示，试求：1）电压U；2）各电源的功率，并指出是发出还是吸收。图9