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问题 补全对话，情景问答
根据所给句子，选择最佳的应答语。每个选项只能用一次。
( ) 1. Who is the girl in the picture?
( ) 2. Some of the plastic bags can't be used after June.
( ) 3. We learned in school that personal computers were invented in 1976.
( ) 4. Look at this heated ice cream scoop.
( ) 5. Do you know how potato chips were invented?
A. You're right.  I didn't have one when I was young.
B. Haha! It's me! The picture was taken ten years ago.
C. They were invented by mistake.
D. They were invented by a cook.
E. Yes, people will use environmental bags instead.
F. I know what it's for! It's used for scooping out really cold ice cream.
答案

1-5.  BEAFC

单项选择题

长方体工件定位，在（）上方分布一个支承点。

A、止推基准面 

B、导向基准面 

C、主要定位基准面 

D、大平面
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单项选择题

某施工单位中标承包了某城市排水工程。该承包单位对该城市排水工程的管道顶进采用普通顶管法施工，在施工过程中的部分工作方法和施工工艺是：

(1)为了便于工作坑内材料和机械的垂直运输，在顶管现场设置吊装设备；

(2)采用手掘式顶管时，工具管接触或切入土层后，自上而下分层开挖；

(3)全段顶完后，在每个管接口处测量其轴线其轴线位置和高程；

(4)在顶进过程中，以高压泵向管外壁与土层之间注入触变泥浆，以减少阻力。

采用顶管法施工，千斤顶应左右对称布置，顶力的合力位置应该和顶进抗力的位置在（）。

A．同一轴线上

B．管道中心的垂线上

C．与管道是平行的平行线上

D．与施工地面垂直的垂直线上
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