阅读短文，完成下列题目。

      I'm Mary. It's my diary. Today is April 5th. I get up early. It's sunny and warm. It's my birthday. Today

I'm very happy. In the morning, I climb mountains and visit grandparents with my parents. In the afternoon,

we watch TV. Grandpa says, " My birthday is in summer. It's hot. We can go swimming." " I like summer best.

I like swimming." I say. All of us are very happy today.

根据短文内容，判断正(√)误(×)。

( ) 1. Mary's birthday is August 5th.

( ) 2. Today is sunny and warm.

( ) 3. Mary's favourite season is spring.

( ) 4. Mary's grandpa's birthday is in summer.

( ) 5. They climb mountains and go shopping today.

船舶用电高峰时，可能会引起电机过载，此时自动分级卸载装置应能自动将（）负载切除，以保证电网的连续供电。

A．次要

B．大功率

C．任意一部分

D．功率因数低的