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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Television broadcasts are (1) to an area that is within the (2) of the sending station or its relay (中转站). (3) television relays are often placed on hills and mountains so that they can (4) a wider r...
A.
books
B.
conference
C.
newspapers
D.
press
【单选题】Passage 18 We all know that it is possible for ordinary people to make their homes on the equator (赤道), although often they may feel uncomfortably hot there. Millions do it. But as for t...
A.
in warm air
B.
in cold air
C.
when it reaches the polar region
D.
only when the clouds are down low
【单选题】Mars Global Surveyor is the oldest of five NASA robotic devices, which is designed to find out signs that Mars once had water;and it had been taking detailed pictures of the red planet for a decade. U...
A.
its life
B.
its orbit
C.
its power
D.
its position
【单选题】Kenya Wildlife Safari from ￡995DAY 1 LONDON/NAIROBIDaylight flight to Nairobi．On arrival, check in at the Holiday Inn Mayfair Court.DAY 2-4 SAMBURU AND TREETOPSSet off on safari, driving north, to the...
A.
traveling long distance
B.
spending nights outdoors
C.
watching animals in the wild
D.
seeing different kinds of plants
相关题目：
【判断题】初級生产力是指植物群落在一定空间一定时间内所生产的有机物质积累的速率。（ ）
A.
正确
B.
错误
【判断题】按人们的需要，把不同种的植物栽植在一起，满足生态需求的植物群落称为自然群落。
A.
正确
B.
错误
【单选题】赤道穿过的大洲中，面积最大的是[ ]
A.
亚洲
B.
非洲
C.
大洋洲
D.
南美洲
【单选题】磁赤道是指下列何者（）。
A.
磁差为零
B.
磁倾角为零
C.
地磁水平分力为零
D.
与地理赤道相重合
【单选题】下列植物群落中，属自然群落的是()
A.
成都龙泉驿的桃园基地
B.
成都植物园的品种园
C.
四川雅安市碧峰峡生态园
D.
大型果园
【单选题】赤道是[ ]
A.
地球最长的纬线
B.
地球最长的经线
C.
地球的旋转轴
D.
东西半球的分界线
【单选题】Passage 18 We all know that it is possible for ordinary people to make their homes on the equator (赤道), although often they may feel uncomfortably hot there. Millions do it. But as for t...
A.
in warm air
B.
in cold air
C.
when it reaches the polar region
D.
only when the clouds are down low
【单选题】Mars Global Surveyor is the oldest of five NASA robotic devices, which is designed to find out signs that Mars once had water;and it had been taking detailed pictures of the red planet for a decade. U...
A.
its life
B.
its orbit
C.
its power
D.
its position
【单选题】形成植物群落的标志是( )。
A.
许多植物生长在一起
B.
生物环境的形成
C.
生态环境的形成
D.
有动物出现
【单选题】Kenya Wildlife Safari from ￡995DAY 1 LONDON/NAIROBIDaylight flight to Nairobi．On arrival, check in at the Holiday Inn Mayfair Court.DAY 2-4 SAMBURU AND TREETOPSSet off on safari, driving north, to the...
A.
traveling long distance
B.
spending nights outdoors
C.
watching animals in the wild
D.
seeing different kinds of plants
【单选题】赤道没有穿过的大洋是（ ）
A.
太平洋
B.
大西洋
C.
北冰洋
D.
印度洋