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【判断题】
在C++中，类的构造函数不能由用户显式调用，在创建对象时由编译器调用。A.
正确
B.
错误
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【单选题】Elephants would _____ if men were allowed to shoot as many as they wished. [ ]
A.
die down
B.
die out
C.
die from
D.
die of
【单选题】______ Alcohol is a major cause of road accidents in that more young men die in the drink-related accidents than in any other way.
A.
T
B.
F
【单选题】Tigers would ______ if men were allowed to shoot as many as they wished.
A.
die of
B.
die from
C.
die down
D.
die out
【单选题】写出一个一元二次方程,使它有两个不相等的实数根( )
A.
x²- x ﹣ 1=0
B.
x² +x ﹣ 1=0
C.
x²- x + 1=0
D.
x² +x + 1=0
【单选题】电力二极管（Power Diode）基本结构和工作原理与信息电子电路中的二极管一样利用PN结的单向导电性，即当PN结正向偏置时就导通，反之则截止，那么在如图中，当按（ ）加上相应的电压时，为正向偏置。【图片】
A.
上面端子的电压高于下面端子的电压
B.
下面端子的电压高于上面端子的电压
C.
上下两个端子只要加上电压就可以
D.
以上均不正确
【单选题】Tigers would__________ if men were allowed to shoot as many as they wished．A.die down###SX
A.
Tigers would__________ if men were allowed to shoot as many as they wished． A.die down
B.
die out
C.
die away
D.
die off
【简答题】Elephants would( )if men were allowed to shoot as many as they wished. A. die down B．die out C．die away D．die off
【简答题】写出一个一元二次方程，使它有两个不相等的实数根______．
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