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单项选择题

大体积混凝土进行配合比设计及质量评定时，可按（ ）龄期的抗压强度进行空制。

A.14d
B.28d
C.60d
D.90d
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问答题
正等轴测图包括（）；（）、和正三测。
单项选择题
根据下面资料，回答21-35题
Mrs．McTavish looked out．"It's a lovely day．Would you like to go for a walk in the park"Her children21with excitement．
"Before we go, you need to follow some rules．Everyone must22hands and stay close to me．You can' t23anywhere by yourself．Can you all do that"
All four24they would．As they walked down the street, Fiona said,"I want an ice lolly(冰棍), Mummy．Can we have some"
"You can if you follow the rules," answered Mrs．McTavish．
The park is just around the corner．The children ran off to25After a while, when Mrs．McTavish looked up she couldn' t see Jock．"Fiona, where' s Jock"
"I don' t know, Mummy．He' s not here26," said Fiona．
The others hadn' t27Jock either．Mrs．McTavish had to gather her children together and walk
around the park28for him．She found him sitting near the ice lolly man．"Jock ! What are you doing
here I couldn' t29you．"
"Mummy, I want an ice lolly, "Jock whispered．
"You can't have one now30you didn't follow the rules．"Mrs．McTavish31one for each of the other children and they licked (~,) them all the way home．Jock cried．When they32home she talked to Jock．"Mummy has four children．I must have rules so I can33an eye on you
and know you' re34．"Jock said he was35and he would follow the rules from then on．
第（31）题选
A.bought
B.made
C.sold
D.borrowed
单项选择题
设备工程安装中，如果由采购方负责设备安装调试，则供货方的现场服务内容不应包括( )。
A.提供现场的地下管线资料
B.派出必要的现场服务人员
C.重要工序须经供货方现场技术人员签字确定
D.整个安装调试过程应在供货方现场人员指导下进行
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