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【单选题】
An electron (charge = −1.6 × C) is moving at 3 × m/s in the positive x direction. A magnetic field of 0.8T is in the positive z direction. The magnetic force on the electron is:A.
4 × N, in the positive z direction
B.
4 × N, in the negative z direction
C.
4 × N,in the positive y direction
D.
4 × N, in the negative y direction
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【单选题】“Did you _____ my English book yesterday?' “No, I didn’t. Did you it to Jane?”
A.
borrow…borrow
B.
borrow…lend
C.
lend…lend
D.
lend…borrow
【简答题】Text 1 W: What can I do for you? M: I want to borrow some books, but I lost my1._________. How can I get a new one? W: Go to the 2.__________ at the end of the hall. You can apply for a new one there....
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