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【单选题】
下面是有关子类及父类构造方法的描述,其中正确的是( )。A.
创建子类的对象时,先调用子类自己的构造方法,然后调用父类的构造方法
B.
子类无条件地继承父类不含参数的构造方法
C.
子类必须通过super关键字调用父类的构造方法
D.
子类无法继承父类的构造方法
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反馈参考答案：
举一反三
【单选题】We met an old friend in New York ____our expectation. She waved at us _____ the street when she saw us.
A.
with; in
B.
out of; next to
C.
in; out of
D.
beyond; from across
【单选题】胎儿出生后血液循环改变的主要原因是
A.
胎盘血液循环中断，卵圆孔关闭
B.
卵圆孔关闭，肺开始呼吸
C.
肺开始呼吸，动脉导管关闭
D.
胎盘血液循环中断，肺开始呼吸
E.
卵圆孔关闭，动脉导管关闭
【单选题】I waved to see him off and watched the train until it disappeared . [ ]
A.
at a distance
B.
from a distance
C.
in the distance
D.
within a distance
【简答题】She waved to him, blowing kisses as though she was _______ board an ocean liner that was carrying her away from him forever.
【单选题】— _____________ do you have PE? — Twice a week. [ ]
A.
How many
B.
How much
C.
How often
D.
When
【单选题】I waved to Nancy, but she was ______ in her thoughts, and made no response.
A.
involved
B.
stuck
C.
absorbed
D.
interested
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