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单项选择题Fill in the blanks with the words in the box and change forms when necessary. log in intimate equate pull together update integrate into profile anonymously 1. They are wrong about [填空1] decentralization with loss of control. 2. Many children with learning difficulties are [填空2] ordinary schools. 3. I received [填空3] phone calls warning me not to go to the police about what I'd seen. 4. Passwords can then be changed so original users can't [填空4] . 5. He sat by the window, his handsome [填空5] outlined against the sky. 6. The immigration information booklet is [填空6] yearly. 7. Dinner was served in an [填空7] room with just two other tables. 8. It was a tremendous amount of work [填空8] a series like that.

单项选择题一匀质矩形薄板，在它静止时测得其长为a，宽为b，质量为．由此可算出其面积密度为。假定该薄板沿长度方向以接近光速的速度v作匀速直线运动，此时再测算该矩形薄板的面积密度则为 （）