What does the text mainly tell us?
Tom’s mother kept telling him that he should work harder, but ____ didn’t help.
The passage mainly tells us that（ ）.
15. The passage tells us ____.
Bill：So MarY，how’S the coffee maker‘working？Mary：Actually，it doesn’t work well． Bill：Why don’t you take it back？Mary：__________，but I‘ve misplaced the receipt．
The last paragraph tells us ______.
What does the paragraph 4 tell us？
This passage mainly tells us ______.
This passage tells us that ______ .
This text tells us______.
Tom' s mother kept telling him he should work harder, but______didn' t help.
The passage tells us that
The passage tells us______.
The first paragraph tells us that_____.
The passage tells us that ______.
如题5-12图所示RLC电路，己知Us（t)=5ω（t)，i（0)=2A, u（0 )=2V。试用S域方法求全响应U（t)。
Shelley’s behavior tells us that she （） a shy young woman.
This passage tells us that ______.
I wish Bill would drive us to the train station but he has______to take us all.
Can you tell us_____？
This passage mainly tells us ______ .
The passage tells us ________.
This passage tells us
题21图所示电路中，uS（t）为单位阶跃函数，R1=R2=2Ω，L=2H。电路的时间常数是（）s。
