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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Questions 62 to 66 are based on the following passage. Everyone must have had at least one personal experience with a computer error by this time. Bank balances are suddenly reported to have jumped fr...
A.
why there are so many computer errors
B.
whether computers make mistakes
C.
how to avoid computer errors in our daily life
D.
the difference between the human brains and computers
【单选题】Questions 62 to 66 are based on the following passage. Everyone must have had at least one personal experience with a computer error by this time. Bank balances are suddenly reported to have jumped fr...
A.
People who use the computers.
B.
The computers that broke down suddenly.
C.
The manufacturers of computers.
D.
Nobody, because they are all unexpected accidents.
【单选题】第一主子午线轴向150，焦度：+1.50D第二主子午线焦度：-0.25D（）
A.
-1.25x15
B.
-1.75x15
C.
+1.25x105
D.
-1.75x105