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【单选题】
若外力超过一定的限度,即使外力去除后构件的形状和尺寸也不能完全恢复原状。这种外力去除后无法恢复的变形称为( )。A.
弹性变形
B.
扭转变形
C.
塑性变形
D.
弯曲变形
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皮皮学刷刷变学霸
举一反三
【单选题】In the author's opinion, black English was initially formed in _________.
A.
Congo Square
B.
the black church
C.
the slave market
D.
some African countries
【单选题】--______ man is your English teacher? -- The man in black.
A.
What
B.
Which
C.
Who
D.
Whose
【单选题】In South Africa, English is the language ________ black parents wish their children to be educated.
A.
for which
B.
that
C.
in which
D.
when
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