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问题 多项选择题

在焊条的强度确定之后，选用碱性焊条的原则应包括（）。

A.焊口处有较多铁锈、油污、水分等

B.焊件结构形状复杂

C.焊件的钢材厚度大

D.焊件在低温条件下工作

答案

参考答案：B, C, D

完形填空

根据上下文内容，将文中划线部分译成汉语或者英语

Dear Mom and Dad

We’re having a wonderful time in Australia. There is so much to see that it is impossible for me to tell you everything. During the past three days, 小题1:我们已经在悉尼(Sydney)四处游览了一番. We climbed the bridge, where we could get a really good view of the city.小题2:We also went to the zoo,  where we saw many animals that can only be found in Australia. We spent some time relaxing in the sunshine at the beach, and then we went to Pitt Street and wandered around for a bit while we did some shopping. Though I would like to spend more time here, the local guide told us that we would fly to Cairns（凯恩斯）tomorrow. 小题3:据说那儿大海非常美, where many different fish live. 小题4:Now everybody is busy packing in order to save time when we get up tomorrow. This time tomorrow we will be enjoying the ocean near Cairns. I can’t wait.

Though I have much more to tell you, I must go to bed now so that I can get up early and get to the airport on time. 小题5:请向奶奶致以我最好的祝福and tell her that I am coming back soon.

Love

Robert
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单项选择题

通风工程检测、调试简要说明中，室内温度、相对湿度测定所有测点宜设在同一高度，离地面（）处。

A．0.5m

B．0.6m

C．0.7m

D．0.8m
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