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【单选题】
凝汽器最佳真空( )极限真空。A.
高于;
B.
等于;
C.
低于;
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【单选题】— Can I borrow your tape-recorder? —No. The last time you borrowed it, you _______ it for a month.
A.
kept
B.
had kept
C.
are keeping
D.
have kept
【简答题】市场环境分析的基本方法SWOT分析方法是指（ ）。
【单选题】I stayed at a hotel the last time I went to Bei Daihe. The window of my room the sea.A．is facedB
A.
I stayed at a hotel the last time I went to Bei Daihe. The window of my room ____ the sea. A．is faced
B.
faces
C.
facing
D.
was faced
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