当文件以Input模式打开时，数据可以被程序写入到这个文件中。 When the file is opened in Input mode, the data can be written to the file by the program.

A、it cannot alter variable costs.

B、total cost and variable cost are usually the same.

C、average fixed cost rises as output increases.

D、it cannot adjust the quantity of fixed inputs.

For a linear continuous-time system, when the initial state isand the input signal is, the output is,; when the initial state isand the input signal is, the output is,. Then, what is the output when the initial state isand the input signal is? ( )

A、

B、,

C、,

D、,

1. When I saw the flowers on the table, I felt so grateful to you because _________________________________________________ (这让我想起你为我做的一切). 2. I enjoyed the short stay at your home which is ______________________________ (既让人开心又让人难忘). 3. Thank you again for those old valuable photos you gave me. I like them so much because ____________________________________________ (它们把我一次次带回过去那些美好的日子中去). 4._______________________________________________________ (在姑妈葬礼上你用双臂拥住我的时候), I felt very appreciative because I was feeling really awful at just then and needed some comfort 5. Thank you for the confidence you have placed in us. We sincerely believe _______________________________________________________ (这将是我们两家公司长期互利合作的开始).

When the Workers Union went on a strike, the country’s air traffic was .

A、That cash is banked on a regular basis .

B、That cash and cheques are accurately recorded in the general ledger.

C、That cash and cheques are not misappropriated.

D、That cash and cheques are relate to C Co

A.slept well

B.could drink a lot of water

C.had to stay below deck

D.had a big room of more than 5 foot high