解列安全门时,应将安全门所有阀门全部关闭。
参考答案:错
解析:解列安全门时,应关闭该安全门的脉冲阀。
It’s warm inside. You’d better take off your coat. Which of the following is correct in pronunciation for the underlined word in the sentence?
A./kæt/
B./kα:t/
C./kait/
D./kəut/
椎骨是由椎间盘、韧带和关节连结而成。( )