问题
单项选择题
直接加热电阻钎焊所使用的加热电流为（）。
A.5000-10000A
B.5000-15000A
C.6000-10000A
D.6000-15000A
答案
参考答案：D
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直接加热电阻钎焊所使用的加热电流为（）。
A.5000-10000A
B.5000-15000A
C.6000-10000A
D.6000-15000A
参考答案：D
从下面方框中选择一个适当的词或短语，并用其适当形式填空，并将其正确形式写在答题卡对应位置。
小题2:Our school held a _______ sports meet last week. 小题3:The weather in the south is _______ (wet) than that in the north. 小题4:Many students can’t look after _______ (they) without the help of their parents. 小题5:We should eat more vegetables and _______ meat. 小题6:Maria is interested in ___________. 小题7:The traffic here is very busy and it’s _______ for children to walk alone. 小题8:My friend ____________her parents when I knocked at the door. 小题9:My book is_______, I can’t find it. 小题10:The good news brings me _______. |