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【单选题】
按照采购主体划分，采购可以分为（ ）。A.
国内采购和国际采购
B.
工程采购、货物采购和服务采购
C.
工程设计采购、监理采购、施工采购和科技采购
D.
公共采购、企业采购和个人采购
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Rescue workers did not stop searching for survivors until______.
A.
late at night
B.
the evening
C.
the morning
D.
the afternoon
【简答题】诗中描写了哪些美好的事物( “好东西”)?它们的寓意是什么?
【单选题】Rescue workers continued the delicate task of sifting through tons of concrete and ______ to try to reach possible survivors.
A.
scraps
B.
leftovers
C.
debris
D.
residues
【单选题】It was very difficult to rescue the drowning boy in the sea. One moment the rescue workers ____him but the next moment they _____. [ ]
A.
caught sight of; lost
B.
caught the sight of; lost his sight
C.
caught sight of; lost sight of him
D.
caught the sight of; lost their sight of him
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