钢的碳当量（）时，其焊接性能较差，属于较难焊的材料。
A、CE＞0.6%
B、CE＜0.6%
C、CE＞0.4%
D、CE＜0.4%
参考答案：A
It was in so poor light that I couldn't _________ what the newspaper said.
A．cry out
B．let out
C．speak out
D． make out
《灵枢•海论》认为人身有四海，它们是（）
A.血海
B.津液之海
C.气海
D.水谷之海
E.髓海
