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【单选题】
我国粮食作物的分布格局是 [ ]A.
麦
B.
稻
C.
南蔗北甜
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】探究规律：3 1 =3，个位数字是3；3 2 =9，个位数字是9；3 3 =27，个位数字是7；3 4 =81，个位数字是1；3 5 =243，个位数字是3，…， 根据你发现的规律，确定3 7 和3 20 的个位数字分别是多少？
【单选题】Laser-dopple radar is especially valuable in space missions because it ______ .
A.
is one thousand times more precise than microwave radar
B.
provides precise measures of the velocity of space vehicles
C.
is a new system of radar
D.
can measure the movement of a spaceship less accurately than a microwave radar
【多选题】运动就是物体“不断地放弃一个位置，又取得另一个位置”，这段话的意蕴是
A.
物质运动的机械性
B.
动中有静，静中有动
C.
动者恒动，静者恒静
D.
运动和静止彼此渗透
【单选题】One of the missions that Franklin carried out in France is to persuade the French government to give financial aid to the American colonies.
A.
Y
B.
N
C.
NG
【单选题】One of the missions of the Orbiting Carbon Observatory is
A.
to observe the formation of CO2.
B.
to collect CO2 samples from space.
C.
to do CO2 experiments in space.
D.
to locate the key places of CO2 emission.
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