【单选题】听力原文:W: To operate the machine properly, you must keep the top closed while the machine is spinning. M: I should have read the instructions more carefully. Q: What can we infer from the conversation? ...
A.
The man made a mistake in operating the machine.
B.
The machine doesn't work properly.
C.
The woman is helping the man repair the machine.
D.
The instructions were not clear enough for the man to read.
【单选题】Apparently Graves sees scientists as a sober, plodding phalanx of soulless thinking machines, never a step that hasn't been carefully thought out in advance.
【判断题】使用直流电源时,正接和反接的效果不同。( )
【单选题】There are several periods in a computer, the longest period is
【单选题】The author feels her life unreal .because__________.
A.
she has become a machine .
B.
she has to deal with data
C.
she loses the interest in social life.
D.
she often has nightmares