试验室拌制砂浆进行试验时,试验室的温度应保持在()
参考答案:20±5℃
从“投入一产出”的工业联系来看,在下列工厂中,宜靠近钢铁,布局的是
A.印刷厂
B.服装厂
C.面包厂
D.汽车厂
The clock ______ last week has gone wrong.
A.which I bought it
B.I bought
C.what I bought
D.that I bought it