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【单选题】
预防肾结石最主要的方法是A.
大量饮水
B.
少吃肉类
C.
保持排便通畅
D.
多运动
E.
定期复查
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举一反三
【单选题】You can use a larger plastic bottle, ____ is cut off, ____ as a pot to grow flowers in.
A.
of which the top; with it’s top
B.
whose top; with its top
C.
whose top; the top of it
D.
the top of which; with it’s top
【单选题】She reminded me that Columbus______the capital of Ohio.
A.
had been
B.
be
C.
is
D.
was
【单选题】What can be inferred from Paragraph 5 about plow animals?
A.
Their use was mandated under the system of Manorialism.
B.
They can pull more weight with their chests than with their necks.
C.
They were replaced by new technologies in the eleventh century.
D.
Humans began to utilize them around 900 ＣＥ.
【单选题】有甲乙两成年男性患者，甲患者左心室舒张末期容积为140ml，收缩末期容积为56ml；乙患者左室舒张末期容积为160ml，收缩末期容积为64ml，两患者的射血分数（）
A.
相等
B.
甲患者高于乙患者
C.
乙患者高于甲患者
D.
无法判断
E.
均低于正常
【单选题】有甲乙两成年男性患者，甲患者左心室舒张末期容积为140ml，收缩末期容积为70ml；乙患者左室舒张末期容积为160ml，收缩末期容积为82ml，两患者的射血分数：
A.
相等
B.
甲患者高于乙患者
C.
乙患者高于甲患者
D.
均低于正常
【单选题】She reminded me that Columbia ______ the capital of Ohio.
A.
were
B.
was
C.
is
D.
would be
【简答题】放大电路在高频信号作用时放大倍数下降的原因是______，而低频信号作用时放大倍数下降的原因是______。 A．耦合电容和旁路电容的存在 B．半导体管极间电容和分布电容的存在。 C．半导体管的非线性特性 D．放大电路的静态工作点不合适
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