判断题

H59是双相黄铜，其强度高于单相黄铜，且适宜于各种冷热加工。（）

答案：错误

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多项选择题

Why does Marriott believe so strongly in taking care of employees?
How many years would a general manager work for Marriott Corporation averagely?
Which of the following is not Marriott core value?
Which of the following perks helps employees to attain a work/life balance?
How many days does Marriott generally train an employee before the employee starts their job independently?
At some Marriott hotels, employees kick up their heels before every shift.
The Marriott Corporation has a common philosophy when it comes to taking care of employees.
It’s a big secret that employees who are motivated tend to be more likely to reach their goals.
Marriott Corporation is small on training employees.
Marriott may train employee to perform several jobs.

单项选择题

以下关于抽象类的说法错误的是（）。

A．抽象类可以实例化
B．抽象类可以包含抽象方法
C．抽象类可以包含抽象属性
D．抽象类可以引用派生类的实例