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【单选题】
下列植物有两型叶的是( )A.
千头柏
B.
金枝千头柏
C.
金星桧
D.
铺地柏
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举一反三
【单选题】患者女性，64岁。糖尿病病史10余年，近1年经常出现活动后心慌气短，伴有心前区疼痛，休息后可缓解。考虑该患者可能合并
A.
微血管病变
B.
周围神经病变
C.
白内障
D.
大血管病变
E.
酮症酸中毒
【单选题】Henry can't attend the party _____ at Tom's house at present because he is preparing tomorrow's presentation. [ ]
A.
hold
B.
to hold
C.
to be held
D.
being held
【简答题】正反转控制中 将接触器KM1与KM2常闭触点分别串接在对方线圈电路中,防止主电路发生两相电源短路事故,形成相互制约的控制,称为( )或( )控制。
【简答题】一个工厂由于采用新工艺，现在每件产品的成本是20.4元，比原来降低了15%．原来每件产品的成本是多少元？
【单选题】. I’m sorry to have known my train arrives in New York at eight o’clock tonight. The plane I would like to take from there ____ by then.
A.
will have left
B.
would leave
C.
had left
D.
has left
【单选题】Some students can't attend ground classes because they ______.
A.
are too lazy
B.
don't have the money to study
C.
may not be able to attend classes for military reasons
D.
are sick or too busy
【简答题】为了避免正反转电路的主电路发生两相电源短路事故发生,将接触器 KM1 和 KM2 常闭触点分别串接在对方线圈电路中,形成相互制约的控制,称为 ________ 或 ________ 控制。
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