如图所示，甲、乙两个电路都是由一个灵敏电流计G和一个滑动变阻器R组成，（1）甲表是电流表，R增大时量程增大 （2）甲表是电流表，R增大时量程减小（3）乙表是电压表，R增大时量程增大 （4）乙表是电压表，R增大时量程减小

下列说法正确的是（   ）

海洋是人类发展的资源宝库，保护我们的“蓝色国土”需要实施综合管理．读我国南海盐场、沉积盆地分布图和海洋污染示意图，完成．

对南海海洋资源开发和保护的措施中，错误的是（　　）

物体摩擦产生____。

Mum: Get up, Mike!

Mike: Mum, what time is it now?

Mum: It's eight o'clock.

Mike: Oh, it's time to go to school. I'm late.

Mum: Don't worry! It's Saturday today.

Mike: I forgot it（忘记）. What's the weather like today?

Mum: It's rainy.

Mike: Can I go to the library?

Mum: No, you can't. It's cold outside. It's only 2 degrees. You can read books at home.

Mike: OK, mum. Where's my schoolbag?

Mum: It's in your study.

Mike: Thank you, mum!