膨胀节能够防止设备间的管连接因变形而损坏是利用它的（）。
A.弹性
B.伸缩性
C.热缩性
D.冷缩性
参考答案：B
His efforts to raise money for his program were ________ because no one showed any intention to take
a cent out of their pockets. [ ]
A. in place
B. in sight
C. in effect
D. in vain
一直陪苏东坡到九江的朋友不含（）。
A、陈糙
B、参寥
C、乔今
D、佛印
