第3题
A、Tmax越大,电网损耗越大
B、Tmax越小,电网损耗越大
C、Tmax为0.5年时,电网损耗最大
D、Tmax与电网损耗没有明确关系
第4题
A、Person x = new Student();
B、Person x = new Person();
C、Student x = new Person();
D、Student x = new Student();
第7题
A、They have a daughter
B、They work to hard
C、They want to raise their daughter by themselves.
D、They don’t want to limit their real life to a short time before work or after work.
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