用户通过桌面背景的设置，可以改变项目颜色、字体大小。
A. 正确
B. 错误
The best way to solve this problem is______.
A. to see that math only involves the numbers
B. to see you can learn the numbers no worse than others
C. to tell you that you will know them soon
D. to tell yourself that math involves using the same numbers
Every device______ in the spacecraft must be designed and made with great care so as to be
A. to be fitted
B. fitted
C. fitting
D. to have been fitted
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