题目内容

Now, there is some hope of______ a settlement of the dispute.

A. there be
B. there being
C. there to be
D. being

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For there ______ successful communication, there must be concentration and involvement in the debate itself by all present.

A. is
B. to be
C. will be
D. being

集料是指在混合料中起骨架和填充作用的粒料,包括( )等。

A. 碎石
B. 砾石
C. 石屑
D. 砂

属于人工填料的是( )。

A. 碎石
B. 破碎砾石
C. 机制砂
D. 河砂

在混合料中起骨架和填充作用的是( )。

A. 粗集料
B. 细集料
C. 填料
D. 胶凝材料

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