very bad; sad and without hope
A. silver lining
B. recession
C. dismal
D. cervical
E. back burner
F. campaign
G. binge
H. outright
I. disconcerting
J. overall
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in general rather than in particular, or including all the people or things in a particular group or situation
A. silver lining
B. recession
C. dismal
D. cervical
E. back burner
F. campaign
G. binge
H. outright
I. disconcerting
J. overall
a subordinate position
A. silver lining
B. recession
C. dismal
D. cervical
E. back burner
F. campaign
G. binge
H. outright
I. disconcerting
J. overall
两轴测轴之间的夹角为轴间角，正等轴测图的三个轴间角分别为（ ）度。
A. 90，90，180
B. 120，120，120
C. 90，135，135
轴测投影方向垂直于轴测投影面的投影图，称为（ ）
A. 二测轴测图
B. 斜轴测图
C. 正轴测图
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