【名词&注释】
油料作物(oil crop)、本质区别(essential difference)
[判断题]原子，分子，离子都是构成物质的微粒 。 （ ）
查看答案&解析
举一反三：
[单选题]______more,andyou’llimproveyourspokenEnglish.
A. Speak
B. Speaks
C. Speaking
D. Tospeak
[单选题]．碳元素与氧元素的本质区别是
A. 质子数不同
B. 电子数不同
C. 中子数不同
D. 最外层电子数不同
[单选题]AMan invented a lot of sports equipment． The first true piece was the ball．
A. But a badly thrown stone could hurt a child． Looking for something less dangerous to throw，the peo-ple in Egypt made the first balls．
B. They used vines(藤) to keep the leaves to-gether． Later they began to use pieces of animals' skin and filled them with some light things．These balls were much better than the old ones．
C. They began to play these ball games according to the rules． They thought that ball playing was one of the best ways to teach the young men to be brave and strong．
D. The Egyptians invented _________very long ago．
E. many different games with balls
F. throwing stones
G. dangerous games
H. many different kinds of games
[单选题]我国南方地区主要的糖料作物和油料作物分别是：
A. 甜菜、油菜
B. 甘蔗、大豆
C. 甘蔗、油菜
D. 甜菜、花生
[单选题]小明在小丽的东南方向，小丽在小明的 方向。 （ ）
A. 东南
B. 西北
C. 东北
D. 西南
[单选题]He used to be _____, but now he likes to meet and talk to new people.
A. busy
B. strong
C. tall
D. shy
[单选题]10．—_________are you staying?—For a week．
A. How long
B. How soon
C. How often
D. How many
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