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【简答题】
如图所示，将一个等边三角形各边中点连接起来，得到四个小等边三角形（如图1），再将最上边的一个小等边三角形按同样的方法画出四个更小的等边三角形（如图2），然后再按同样地方法画出第三个图形（如图3）…如此继续下去，第n个图中有______个等边三角形．（用含n的式子表示）
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皮皮学刷刷变学霸
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【简答题】在生产实践中,影响微生物降解农药的因素有哪些?
【单选题】()What information in context can NOT help you understand the word “interdisciplinary” ?
A.
When he was teaching astronomy, Mr. Grable didn't just teach students the names of the planets. He used it as a way to teach mythology.
B.
Mr. Grable introduced Greek and Roman mythology as a way of explaining.
C.
In an astronomy class, the students also learned about the literature of Greek and Roman mythology.
D.
Mr. Grable asked his students to do a research, write a report and make a presentation about the planet they chose.
【单选题】病人23岁,心悸5天,心率98次/分,心电图示P-R间期为0.21秒,应诊断为:
A.
窦性心律
B.
窦性心动过速
C.
Ⅰ度房室传导阻滞
D.
Ⅱ度Ⅰ型房室传导阻滞
E.
Ⅱ度Ⅱ型房室传导阻滞
【多选题】Using context clues in reading can help us
A.
save time
B.
remain focus
C.
improve writing
D.
increase vocabulary
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