下述载重线线段表述错误的是():
A“X”的线段表示夏季载重线
B“R”的线段表示热带载重线
C“Q”的线段表示夏季淡水载重线
D“QR”的线段表示热带淡水载重线
参考答案:D
--- What’s the matter with Jason. He looks a bit upset.
--- Didn’t you know? When returning from his holiday last night, he found his house________.
A.broken off
B.broken into
C.broken out
D.broken down
锅炉点火前,链条式炉排引火物应铺设在()。
A.预燃区
B.燃烧区中间
C.燃烧区前端
D.预燃区和燃烧区之间