有下列四种说法：

①命题“∃x∈R，x²﹣x＞0”的否定是“∀x∈R，x²﹣x≤0”；

②“命题p∨q为真”是“命题p∧q为真”的必要不充分条件；

③“若am²＜bm²，则a＜b”的逆命题为真；

④若实数x，y∈0，1，则满足：x²+y²＜1的概率为$\frac{\mathrm{\pi }}{4}$．

其中错误的个数是  （　　）

选择恰当的成语，将正确选项的字母填在横线上。

我父亲诞生于1896年，那是中华民族陷于          的时代。他一生都喜欢这首歌曲。（   ）

    Become a Volunteer and Make a Difference

    The First Tee, as an outstanding youth development organization, is always searching for good people that want to volunteer at one of our many Pittsburgh area locations.

    We're Looking for You!

    Nationwide, we currently have more than 3,700 coaches signed up with The First Tee as well as volunteers. But you don't have to be a golf professional or even a good golfer. With The First Tee Coach Program, we provide the training you need.

    Developed with input from leading experts in the field of positive youth development, our program focuses on making participants stronger and more confident through decision-making and exploring options, inspiring the golfers of tomorrow to look to the future, set goals, and unlock their potential.

    We also need more volunteers to make The First Tee possible. Opportunities include:

    Assistant Coach: assist in our weekly golf clinics. All that we request is that you make a 7-week commitment (one day per week), for 2 hours each week. Each clinic is led by one of our trained staff members who creates a written lesson plan for our volunteers to follow.

    Database Manager: input data entry of participants, volunteers, and community relation records and update chapter information for Home Office and community relations. The database manager is expected to update the data a minimum of every other week.

    Equipment Manager: organize and sort donated equipment, get rid of unfit equipment, and arrange equipment for distribution to participants at least once a week.

    Greeter: register participants, hand information to parents, greet visitors, answer phone and provide general program information.

Process of Becoming a Volunteer

    Begin by filling out the Google Forms application below. Once Alison Boyle (our Director of Volunteer and Participant Services) receives your completed application, she will contact you for an in-person interview.

    CLICK HERE to fill out a Volunteer Application via Google Forms

    For more information, please contact our Director of Volunteer and Participant Services, Alison Boyle, at aboyle@the first teepittsburgh.org.