单一参数电感元件的正弦交流电路中,消耗的有功功率等于零。
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Education is _______for all children in Britain between the ages of 5 and 16.
A. alternative
B. compulsory
C. necessary
D. competitive
I lost touch with most of my old school friends. With the help of internet, I have finally _________most of them.
A. tracked down
B. tracked out
C. modeled after
D. looked for
Many other countries _______ their schools _____ British schools, and with good reason.
A. go after
B. look after
C. model after
D. run after
I'm supposed to ______ the thesis ____ my tutor this weekend. However, I haven't written a single word.
A. submit… to
B. hand … in
C. give … to
D. assign … to