问题
单项选择题
制冷机组二次灌浆所用的细石混凝土或水泥砂浆的强度标号应比基础强度标号高（）级。
A、1～2
B、1～3
C、2～3
D、3～4
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
制冷机组二次灌浆所用的细石混凝土或水泥砂浆的强度标号应比基础强度标号高（）级。
A、1～2
B、1～3
C、2～3
D、3～4
参考答案：A
| 选用恰当的连接词填空。 | |
2. I am not sure ____ he will lend me ahand. 3. My parents are very kind to me and always let me do ____ I think Ishould. 4. The trouble is ____ I am anxious to telephone Mr Srmth but I have lost hisnumber. 5. He looked just ____ he had looked ten years ago. 6. It sounds ____ someone is knocking at the window. |