构筑切端瓷及透明瓷应超出原有形态的多少,以补偿其收缩()
A.5%~10%
B.10%~15%
C.15%~20%
D.20%~25%
E.30%
参考答案:C
Peter was so excited _______he received an invitation from his friend to visit Chongqing.
A.where
B.that
C.why
D.when
高压试验,因试验需要断开设备接头时,接后应进行检查。