【简答题】冷弯检验是:按规定的________和________进行弯曲后,检查试件弯曲处外面及侧面不发生断裂、裂缝或起层,即认为冷弯性能合格。[填空(1)] [填空(2)]
【单选题】下列不属闪光对焊接头正式施焊条件的是()
A.
每批钢筋焊接前,应先选定焊接工艺和参数,按实际条件进行试焊,并检验接头外观质量及规定的力学性能。仅在试焊质量合格和焊接工艺(参数)确定后,方可成批焊接
B.
每个焊工均应在每班工作开始时,先按实际条件试焊2个对焊接头试件,并作冷弯试验,待其结果合格后,方可正式施焊
C.
焊工具有不少50000个接头作业经验,方可正式进行实体工程施焊作业
【多选题】3-5在Photoshop中下面【 】可以用于调整图像的亮度与对比度。
【单选题】听力原文:M: I bought a few books at the new bookstore. Would you like to have a look at them? W: A few? It looks like you bought out the bookstore. Q: What does the woman mean? (8)
A.
She didn't like the books the man bought.
B.
There wasn't a large selection at the bookstore.
C.
The man bought a lot of books.
D.
She wanted to see what the man bought.
【单选题】设总体均值为 100 ,总体方差为 25 ,在大样本情况下(假设样本容量为n),无论总体的分布形式如何,样本平均数的分布都服从或近似服从趋近于( )
【简答题】There
are 600 coral cays in the Great Barrier Reef Marine Park (GBRMP), with several
sandy cays visited regularly by reef tour operators. These include Michaelmas Cay, a major seabird nesting area . I...
【单选题】设抽样得到10个样本观测值如下:19.1 20.0 21.2 18.8 19.6 20.5 22.0 21.6 19.4 20.3,则样本方差为___________.
【单选题】一般来讲,理想的商务谈判团队人数为()人
【单选题】设抽样得到10个样本观测值如下:19.1 20.0 21.2 18.8 19.6 20.5 22.0 21.6 19.4 20.3,则样本均值为___________.