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【单选题】
—What were you up to when she dropped in?—I ______ for a while and ______ some reading.A.
was playing, was going to d0
B.
played, did
C.
had played, was going to do
D.
had played, did
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反馈参考答案：
举一反三
【简答题】商品定位包括品种、( )、价格、服务等方面。
【单选题】关于心包，叙述错误的是：
A.
包裹心和出入心大血管的纤维浆膜囊
B.
分为纤维性心包和浆膜性心包
C.
浆膜心包分脏、壁两层
D.
浆膜心包的脏壁两层之间形成心包腔
E.
以上都对
参考解析：
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