Carbon dioxide()from burning fuels is the most common of the so-called green-house gases.
A. producing
B. having been produced
C. to be produced
D. produced
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下列关于虚拟存储器的论述中,正确的是 (55) 。
A. 要求作业在运行前,必须全部装入内存,且运行过程中也必须一直驻留内存
B. 要求作业在运行前,不必全部装入内存,在运行过程中不必一直驻留内存
C. 要求作业在运行前,不必全部装入内存,但在运行过程中必须一直驻留内存
D. 要求作业在运行前,必须全部装入内存,但在运行过程中不必一直驻留内存
—Ring me at 5 am. No, better not so early ! I().—I got it.
A. will sleep
B. sleep
C. am sleeping
D. will be sleeping
One more week,()I will get everything ready.
A. and
B. or
C. while
D. but
GB2312-80中规定的汉字国标码采用 (19) 字节存放一个汉字,每个字节的最高位为1,作为汉字机内码。
A. 2
B. 3
C. 4
D. 6