尺寸界线用细实线绘制，并由图形的轮廓线、轴线或对称中心线引出。也可利用（）、（ ）或（ ）代替。
A. 轮廓线
B. 粗线
C. 轴线
D. 对称中心线
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尺寸线用来表示所注尺寸的度量方向，应用细实线绘制，其终端有（ ）两种形式。
A. 箭头
B. 直线
C. 折线
D. 斜线
线性尺寸数字一般应注写在尺寸线的____或____。★10、平面图形中所注尺寸按作用分为____和____。
The word "odds" in "Though the odds are that you'll be unemployed and depressed..." (para.1) means
A. something is likely to happen
B. disagree
C. something that is strange
D. something not happening very often
By saying " The year 2020 is a ripe target for prediction", the author implies that
A. "2020" is a symmetrial round number, which sounds auspicious.
B. "2020" is not far away to be in the "future", yet close to make predictions seem credible.
C. Almost all companies make predictions starting with " By 2020".
D. People make too many predictions about 2020.
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