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【单选题】
下列关于肺泡表面活性物质的描述,错误的是A.
维持肺泡的扩张状态
B.
降低肺泡表面张力
C.
稳定肺泡容积
D.
降低肺的顺应性
E.
防止血管内液体流入肺泡
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举一反三
【单选题】My friend John called and ____me to his party just now.
A.
will invite
B.
invited
C.
invites
D.
has invited
【单选题】— Has John arrived? —Yes, already. ________ he wait outside or just come in?
A.
Shall
B.
May
C.
Could
D.
Must
【简答题】总线上连接的各类设备,按其对总线有无控制功能可以分为________ 的___________。
【简答题】总线上连接的各类设备,按其对总线有无控制功能可以分为____和____。
【单选题】听力原文：W: Hello. May I speak to John? M: Sorry, he has just gone to America for a meeting. Where is John now?
A.
America.
B.
China.
C.
Canada.
【单选题】I don't think John saw me. He ____ a book at that moment. [ ]
A.
just read
B.
has just read
C.
was just reading
D.
had just read
【简答题】先找规律,再填一填. 66、67、68、________、________、________.
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