在一个三投影面体系中,两投影面的交线称为投影轴,H面与V面的交线为OX轴,H面与W面的交线为OY轴,V面与W面的交线为OZ轴,三条投影轴两两互相垂直并汇交于原点O。
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Directions: Choose the best answer which has the closest meaning of the underlined word.It had been an abominable afternoon, culminating at about six o’clock in her father’s attempted suicide.
A. pleasant
B. boring
C. terrible
D. pitiful
Directions: Choose the best answer which has the closest meaning of the underlined word.She cross-examined any guests who had pretensions to legal or medical knowledge.
A. claim
B. intelligence
C. excuse
D. attention
Directions: Choose the best answer which has the closest meaning of the underlined word.He was smiling whimsically, a gentle, self-regarding smile of reminiscence.
A. remember
B. memorize
C. recollection
D. recall
Directions: Choose the best answer which has the closest meaning of the underlined word.Sophisticated instruments, which took weeks to analyze the wave’s velocity and pressure, confirmed Fermi’s instant estimate.
A. experienced
B. complicated
C. important
D. beautiful