题目内容
（请给出正确答案）
管道进行气压试验的正确步骤是 （）。
A.缓慢升压至试验压力的30%→按试验压力的10%逐级升压后每级稳压3min→直至试验压力稳压10min→试验压力降至设计压力涂发泡剂检验不泄漏为合格
B.缓慢升压至试验压力的50%→按试验压力的10%逐级升压后每级稳压3min→直至试验压力稳压10min→城验压力降至设计压力涂发泡剂检验不泄漏为合格
C.缓慢升压至试验压力→稳压10min→涂刷发泡剂检验不泄漏为合格
D.缓慢升压至试验压力→稳压10min→试验压力降至设计压力保持30min→以压力不降无渗漏为合格
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第1题
Mr. White was unhappy because his hair stopped growing.
A．Right.
B．Wrong.
C．Doesn't say.
第2题
—"How dark your brother's hair is!"—"It's______mine when I was at his age. "
A．no darker than
B．no more darker as
C．not dark more than
D．not darker as
第3题
The barber asked Mr. White to use cream on his head to help hair grow.
A．Right.
B．Wrong.
C．Doesn't say.
第5题
"How dark your brother's hair is!""It's ________ mine when I was at his age."
A．no darker than
B．no more darker as
C．not dark more than
D．not darker as ~
第6题
A．A tall man with dark hair and a moustache.
B．A youth with a distinguishing mark on his face.
C．A thirty-year-old guy wearing a light sweater.
D．A medium-steed young man carrying a gun.
第7题
A．A tall man with dark hair and a moustache.
B．A youth with a distinguishing mark on his face.
C．A thirty-year-old guy wearing a light sweater.
D．A medium-steed young man carrying a gun.
第8题
A．white
B．hairless
C．gol
D．old
第9题
The barber advised(建议)John ______.
A．to have his hair cut short
B．to cut off most of his hair
C．to be cut off his long hair
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