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【单选题】
要执行的指令及数据存放于主存中,CPU执行指令指示程序执行顺序的器件是A.
状态寄存器.
B.
指令寄存器
C.
程序计数器
D.
通用寄存器
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反馈参考答案：
举一反三
【单选题】The author of a book on Google and an early admirer John Battelle thinks that ______.
A.
he becomes more wary due to Google
B.
Google makes many users uneasy
C.
he persists in supporting Google
D.
Google controls one source
【单选题】She said that she would be here at seven o'clock. But she didn't ___________ until eight thirty.
A.
turn on
B.
turn up
C.
turn out
D.
turn down
【单选题】下列说法错误的是()。
A.
剩饭剩菜隔夜后，微生物会迅速的生长繁殖，尤其是像蛋白质特别容易被微生物所分解的海鲜，更容易滋生微生物。
B.
剩饭剩菜中滋生的普通微生物并不可怕，只要吃之前对隔夜海鲜进行彻底加热就可以了，并且营养成分也不会被破坏。
C.
普通细菌、病毒和寄生虫几分钟即可被杀灭，但对于食物中细菌产生的化学性毒素来说，加热完全对它构成不了威胁，有时加热不仅不能把毒素破坏，反而会增加毒素的浓度。
D.
在冰箱里储存的剩余海鲜，吃之前一定要对其彻底加热，因为低温只能抑制细菌繁殖，不能杀死细菌，细菌还是存在的，而高温则可以杀死细菌。
【单选题】The author's friend solved her problem by______.
A.
telling her admirer directly
B.
keeping on dating with her admirer
C.
avoiding meeting her admirer any more
D.
bringing her admirer together with another girl and still having him as a friend
【单选题】The main idea of this passage is ______.
A.
it is possible to discourage an admirer without hurting his feeling
B.
there are many solutions to the problems of dating
C.
an admirer has feeling as sensitive as our own
D.
it's tiresome to have someone around too much
【单选题】She said that she would be here at seven o’clock. But she didn’t ____ until eight.
A.
turn on
B.
turn up
C.
turn out
D.
turn down
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