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【单选题】
设事件 互斥,且 ,则下列式子成立的是 。A.
B.
C.
针砭时弊
D.
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举一反三
【单选题】What causes wind on top of hills and mountains?
A.
cool air rising while hot air sinks
B.
cool air and hot air hitting each other
C.
hot air rising while cool air sinks
D.
cool air and rain clouds
【单选题】They have to walk_________8 country parks and___________20 hills and mountains. [ ]
A.
up; up
B.
over; over
C.
through; over
D.
along; down
【简答题】扫描仪按感光器件可分为光电倍增管(PMT)、()(CCD)和()(接触式感光器件)。
【简答题】[A]lake [ B] river [C] mountains [D] hills
【单选题】The highland zone is an area of high hills and mountains in the______of Britain.
A.
north and west
B.
north and east
C.
south and west
D.
south and east
【单选题】—Oxfam trailwalkers in Hong Kong have to climb________ twenty hills and mountains. —It’s really a tough hike.
A.
through
B.
around
C.
over
D.
along
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