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【简答题】
已知一标准直齿圆柱齿轮的齿数z=72,全齿高h=18mm,则齿轮的模数m=______,分度圆直径d=_______。
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【简答题】通过文件的学习, 请写出印象最深的5种。另外你还知道哪些文章没有提及的设备?
【单选题】The old lady was suffering from the empty nest syndrome for so long that she felt like to find someone she could talk to her.
A.
to find someone to talk
B.
finding someone to talk
C.
to find someone to talk to
D.
finding someone to talk to
【简答题】迄今为止我国仍没有一部完整的（ ）。
【单选题】_______at his son, the old lady felt _______.
A.
surprised ,disappointed
B.
surprised , disappointing
C.
surprising, disappointing
D.
surprising, disappointed