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【单选题】
下列描述 CPU 从主存中读出数据时,各信号的传输顺序正确的是() 1) CPU 将地址信息送到 MAR 寄存器,再送到地址总线 2) CPU 将数据信息送到 MDR 寄存器,再送到数据总线 3) CPU 将读命令从控制总线输出 4) 主存将数据信息送到数据总线,再送到 MDR 数据寄存器A.
1) 2) 3)
B.
1)3)4)
C.
3)2)1)
D.
4)1)3)
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【简答题】If you are planning to spend your holidays in Yellowstone National Park in summer, what should you take with you?
【简答题】Which of the following best describes Yellowstone's weather?
【单选题】E Most of the Yellowstone National Park is above 2,275 meters. Yellowstone' s weather is very changeable. In summer, it may be warm and sunny with temperatures in the high 70s. At night in any given m...
A.
sunny warm day may become very stormy with wind, rain and sometimes snow. Without enough clothing and equipment, an easy day-hike or boat-trip can turn into a battle against nature. 72. The campers or hikers are advised to________ [ A] fight against stormy weather [
B.
] stay in a camp at night-time [
C.
] get familiar with the area around [
D.
] prepare for changeable weather
【单选题】Visitors to Yellowstone Park ______ consider their impact on the natural environment, leaving behind litter and other damage.
A.
nearly
B.
seldom
C.
ever
D.
yet
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