He gets so__________ at not being able to do things for himself any more.
A. excited
B. frustrating
C. exciting
D. frustrated
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The lecture __________ him with an opportunity to meet one of his heroes yesterda
A. gave
B. provided
C. offered
D. supplied
在绘制圆环体时,当环管的半径大于圆环的半径时,会生成()。
A. 圆环体
B. 球体
C. 纺垂体
D. 不能生成
16.通过特性匹配(MATCHPROP)命令,可以将源对象的基本特性和特殊特性选择性的复制到目标对象。
A. 对
B. 错
49.矩形可以分解,同样圆也可以分解。
A. 对
B. 错
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