It rained hard yesterday, ______ prevented me from going to the park.

影响混凝土强度和超声波传播速度间的定量关系的因素有哪些?

It is important to ________ your skin from the harmful strong sunlight.

He was ______ to withdraw from running for the presidency.

建筑结构试验是以实验方法测试有关数据，为结构的___________________和___________________的建立提供重要的依据。

The two girls competed with each other ______ the highest mark.

现行规范采用的钢筋混凝土结构构件和砖石结构的计算理论，几乎全部是以___________________的直接结果为基础的。

If the operation ________ carefully prepared, it would not have been successful.

重力加载就是将物体本身的___________________施加于结构上作为荷载。

It took me a month to get rid _______ the cough.