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【单选题】
某电路的图如下所示,下面论述正确的是A.
该电路独立的 KCL 方程为 4 个
B.
该电路独立的 KVL 方程为 2 个
C.
该电路的图是连通图，它的一个树具有 3 个树枝
D.
该电路的图只能有一种树
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举一反三
【简答题】Wang Yan, a 15-year-old Chinese girl, likes eating snacks very much. She prefers cream biscuits, McDonald’s food, KFC chicken. As a result, she has become overweight. Today in China, there are many ch...
【单选题】—Are Li Yan and Wang Mei still living in Pingba? —No, they _______ to Shanghai. [ ]
A.
had moved
B.
moved
C.
will move
D.
have moved
【单选题】-Hi, Wang Ling, can't you recognize me? -Oh, Ma Yan!I ________ you ________ your sister. It's so nice to meet you here!
A.
thought; were
B.
thought; are
C.
think; are
D.
think; were
【单选题】- Hello! Is that Wang Yan? -Yes, _________ [ ]
A.
this is Wang Yan.
B.
who are you?
C.
I'm speaking.
【单选题】下列关于妊娠的说法错误的是
A.
妊娠期全过程共约40周
B.
早期妊娠是13周末以前
C.
中期妊娠是妊娠14周-27周末
D.
晚期妊娠是28周及以后
E.
妊娠期日期计算从末次月经结束日算起
【单选题】Wang Yan will not attend the party if ____ to Amsterdam.
A.
she is going to fly
B.
she would fly
C.
she will fly
D.
she flies
【简答题】What happened to Wang Yan during the challenge?
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