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【单选题】
According to the governor, why should one use solar panels?
A.
The new law requires every resident to install them.
B.
They are environmentally friendly and efficient.
C.
The energy industry needs to be supported.
D.
They costs less to install than the conventional method.
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举一反三
【单选题】The children were _____ into different groups according to how much they know. [     ]
A.
combined
B.
classified
C.
listed
D.
clarified
【单选题】已知[Ag(NH 3 ) 2 ] + 的逐级稳定常数为K 1 ,K 2 ,请问它的稳定常数K为(    )
A.
K 1 +K 2
B.
K 1 -K 2
C.
K 1 /K 2
D.
K 1 ×K 2
【单选题】两直线y 1 =k 1 x+b 1 与y 2 =k 2 x+b 2 相交于y轴,则(  )
A.
k 1 ≠k 2 ,b 1 ≠b 2
B.
k 1 ≠k 2 ,b 1 =b 2
C.
k 1 =k 2 ,b 1 ≠b 2
D.
k 1 =k 2 ,b 1 =b 2
【单选题】若图中的直线l 1 ,l 2 ,l 3 的斜率为k 1 ,k 2 ,k 3 则(  )
A.
k 1 <k 2 <k 3
B.
k 3 <k 1 <k 2
C.
k 2 <k 1 <k 3
D.
k 3 <k 2 <k 1
【单选题】如图,直线l 1 、l 2 、l 3 的斜率分别为k 1 、k 2 、k 3 ,则必有(  )
A.
k 1 <k 3 <k 2
B.
k 3 <k 1 <k 2
C.
k 1 <k 2 <k 3
D.
k 3 <k 2 <k 1
【单选题】A:How much () they? B:Two yuan twenty fen.
A.
is
B.
are
C.
was
D.
were
【判断题】喷油器的电流驱动既可用于低阻,又可用于高阻。 ( )
A.
正确
B.
错误
【简答题】How much were the letters worth on the market, and how much was the final deal?
【单选题】How much were the letters worth on the market, and how much was the final deal?
A.
Seven dollars. Five dollars.
B.
Seven dollars. Seven dollars.
C.
Five dollars. Five dollars.
D.
Five dollar. Seven dollars. .
【单选题】关于函数返回值,以下叙述中正确的是________。
A.
函数返回值的类型由函数体内return语句包含的表达式的类型决定
B.
函数返回值的类型由函数首部定义的函数类型决定
C.
若函数体中有多个return语句,则函数的返回值是排列在最后面的return语句中表达式的值
D.
若函数体内没有return语句,则调用函数后不能得到任何值
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